CN110649976B - Bit state measuring and reading device and method suitable for multi-quantum computer chip - Google Patents
Bit state measuring and reading device and method suitable for multi-quantum computer chip Download PDFInfo
- Publication number
- CN110649976B CN110649976B CN201910775561.1A CN201910775561A CN110649976B CN 110649976 B CN110649976 B CN 110649976B CN 201910775561 A CN201910775561 A CN 201910775561A CN 110649976 B CN110649976 B CN 110649976B
- Authority
- CN
- China
- Prior art keywords
- signal
- module
- microwave
- reading
- acquiring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 73
- 238000001914 filtration Methods 0.000 claims description 36
- 229910001006 Constantan Inorganic materials 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 230000006399 behavior Effects 0.000 claims 28
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 8
- 239000002096 quantum dot Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005040 ion trap Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a bit state measurement reading device and method suitable for a multi-quantum computer chip, wherein the device comprises: the microwave switch chip selection module comprises a measurement module, a reading module and a microwave switch chip selection module; the measurement module is respectively connected with the reading module and the microwave switch chip selection module, and the reading module is connected with the microwave switch chip selection module; a measurement module: acquiring a measuring signal for exciting the quantum chip according to the pulse signal; the microwave switch chip selection module: sending the measuring signal to an input port of a specific chip; according to the measurement signal, a specific chip is appointed to respond, and a reading signal is output; a reading module: acquiring an acquired read signal according to the read signal and the data acquisition signal; the data acquisition signal directs the act of data acquisition by the data acquisition card. Under the conditions of limitation of space and refrigeration power of low-temperature equipment and limited number of transmission cables available in the low-temperature equipment, the chip measurement efficiency is improved.
Description
Technical Field
The invention relates to the technical field of measurement and reading of superconducting quantum computer chips, in particular to a bit state measurement and reading device and method suitable for a multi-quantum computer chip.
Background
Quantum computing is an emerging interdisciplinary with development potential of a gate based on the principle of quantum mechanical superposition and quantum entanglement characteristics. The quantum state coding information for quantum computation is controlled and evolved according to quantum mechanical rules and algorithm requirements, and finally, the information is read through measurement, and a quantum information processing task is finally realized. Quantum computing can complete the computing task which cannot be completed or is difficult to complete by classical computing, and the potential huge application of the quantum computing causes the research on quantum computing theory and experiments in the scientific community for over ten years. Currently, physical systems that may realize quantum computers are being explored, such as ion traps, cavity quantum electrodynamics (cavity QED), nuclear magnetic resonance, quantum dots, superconducting josephson junctions, and linear optics. Superconducting josephson junction quantum computing is considered to be one of the most promising schemes due to its natural advantages in design processing, scale integration. The quantum computer mainly comprises a quantum chip, a regulation and control measurement reading system and algorithm software. The quantum chip is the core of quantum computation, the regulation and control of the measurement reading system is the implementation of the quantum chip control, and the algorithm software is a method for solving the specific problems by quantum computation. Qubits are a division of physical qubits and logical qubits. A logical qubit is one of the smallest units used for computation. While physical qubits refer only to josephson junctions with quantum effects. For example, a quantum computer of 50 qubits refers to a computer of 50 logical qubits, rather than 50 physical bits. At present, two different schemes exist internationally to realize fault-tolerant quantum computing, the first is surface code error correction, that is, a plurality of physical qubits are entangled to realize a logical qubit, and 50 logical qubits may need thousands of physical qubits or even millions of qubits to be integrated to construct the logical qubit. Another way is to achieve very high precision quantum gate operation, in which case the operation of 50 physical qubits can also achieve computational power beyond supercomputers. The precondition of this method is that we need to improve the operation precision of the quantum gate to 99.99% of the precision of the single quantum gate and more than 99.95% of the precision of the double quantum gate. At present, the research and development of quantum chips are still in an exploration stage, and the design method and the production process are not mature. Especially, the design result of multiple quantum bits is very different from the trial production result. The pre-manufactured chip needs to be measured, and the measurement result is fed back to the design for improvement design. The chip measurement needs to be performed in a low-temperature environment of 10mK, due to the limitation of space and cooling power of the low-temperature equipment and the limited number of transmission cables available in the low-temperature equipment. How to improve the chip measurement efficiency under the existing conditions becomes an important problem of the measurement work.
Patent document CN109327190A discloses a multi-quantum-bit-modulation reading apparatus, which is characterized by comprising: the two-time frequency conversion control unit is used for regulating and controlling the quantum bit and the Josephson parametric amplifier reading unit used for reading the quantum bit, wherein the two-time frequency conversion control unit comprises an IQ pulse signal source, a first local oscillation signal source, a second local oscillation signal source, a first mixer and a second mixer, the IQ pulse signal source generates two low-frequency square wave signals or low-frequency Gaussian wave signals with the phase difference of 90 degrees, the low-frequency square wave signals or the low-frequency Gaussian wave signals are subjected to pulse modulation through the first mixer and the first local oscillation source to obtain two low-frequency signal pulses with the phase difference of 90 degrees, and secondary spectrum shifting is carried out through the second mixer and the second local oscillation signal source to obtain high-frequency pulse signals, under the conditions of limitation of low-temperature equipment space and refrigeration power and the limitation of the number of transmission cables available in low-temperature equipment, there is still a perfect space for improving the chip measurement efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bit state measurement reading device and method suitable for a multi-quantum computer chip.
The bit state measuring and reading device suitable for the multi-quantum computer chip provided by the invention comprises: the microwave switch chip selection module comprises a measurement module, a reading module and a microwave switch chip selection module; the measurement module is respectively connected with the reading module and the microwave switch chip selection module, and the reading module is connected with the microwave switch chip selection module; a measurement module: acquiring a measuring signal for exciting the quantum chip according to the pulse signal; the microwave switch chip selection module: sending the measuring signal to an input port of a specific chip; according to the measurement signal, a specific chip is appointed to respond, and a reading signal is output; a reading module: acquiring an acquired read signal according to the read signal and the data acquisition signal; the data acquisition signal directs the act of data acquisition by the data acquisition card.
Preferably, the measurement module employs: an arbitrary waveform generator 1, a microwave source 6, a modulator 2, and a first filter 3; the measurement module includes: a signal generation module: the arbitrary waveform generator 1 generates a pulse signal; the microwave source 6 generates a microwave signal with a specific frequency; a modulation signal module: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter; a first filtering module: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter; the modulation behavior parameters instruct the behavior of the modulator 2 to modulate a pulse signal onto a microwave signal; the first filtering behavior parameter directs the behavior of the first filter 3 to filter out spurious signals generated at the modulator non-linear characteristic.
Preferably, the microwave switch chip selection module adopts: a microwave shunt switch 4, a combination of a plurality of chips and a microwave combiner switch 5; the microwave switch chip selection module comprises: microwave shunt gating module: outputting a measuring signal to a specific chip by using a microwave shunt switch 4; microwave path combining gating module: a specific chip is excited to generate a reading signal; and outputting a reading signal to the reading module by using the microwave combining switch 5. The microwave shunt switch 4 and the microwave combiner switch 5 adopt the following steps: SP 6T.
Preferably, the reading module employs: an isolator 11, a second filter 10, a low noise amplifier 9, a demodulator 8, an acquisition card 7 and a microwave source 6; the reading module includes: the unidirectional gating module: according to the reading signal, the isolator 11 is utilized to transmit the reading signal to the load direction, and a one-way reading signal is obtained; a second filtering module: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter; an amplification module: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter; a demodulation module: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter; a data acquisition module: acquiring a data acquisition signal according to a read signal to be acquired and a data acquisition parameter; the second filtering behavior parameter directs the behavior of the second filter 10 to filter out clutter signals; the amplified signal parameters direct the amplifier 9 to amplify the unidirectional read signal to a specific signal amplitude; and the demodulation behavior parameters instruct the demodulator 8 to demodulate the modulation information in the modulated signals to acquire the behavior of the read signals to be acquired.
Preferably, the measuring module, the reading module, the microwave switch chip selection module and the components in each module are connected by microwave coaxial cables; the microwave coaxial cable adopts 6J40 constantan enameled wire.
The invention provides a bit state measurement reading method suitable for a multi-quantum computer chip, which is characterized by comprising the following steps: measuring, reading and microwave switch chip selection; a measurement step: acquiring a measuring signal for exciting the quantum chip according to the pulse signal; a microwave switch chip selection step: sending the measuring signal to an input port of a specific chip; according to the measurement signal, a specific chip is appointed to respond, and a reading signal is output; a reading step: acquiring an acquired read signal according to the read signal and the data acquisition signal; the data acquisition signal directs the act of data acquisition by the data acquisition card.
Preferably, the measuring step comprises: a signal generating step: the arbitrary waveform generator 1 generates a pulse signal; the microwave source 6 generates a microwave signal with a specific frequency; a signal modulation step: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter; a first filtering step: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter; the modulation behavior parameters instruct the behavior of the modulator 2 to modulate a pulse signal onto a microwave signal; the first filtering behavior parameter directs the behavior of the first filter 3 to filter out spurious signals generated at the modulator non-linear characteristic.
Preferably, the microwave switch chip selection step comprises: microwave shunt gating: outputting a measuring signal to a specific chip by using a microwave shunt switch 4; microwave combining and gating: a specific chip is excited to generate a reading signal; and outputting a reading signal to the reading step by using a microwave combining switch 5. The microwave shunt switch 4 and the microwave combiner switch 5 adopt the following steps: SP 6T.
Preferably, the reading step comprises: a one-way gating step: according to the reading signal, the isolator 11 is utilized to transmit the reading signal to the load direction, and a one-way reading signal is obtained; a second filtering step: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter; an amplification step: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter; a demodulation step: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter; a data acquisition step: acquiring a data acquisition signal according to a read signal to be acquired and a data acquisition parameter; the second filtering behavior parameter directs the behavior of the second filter 10 to filter out clutter signals; the amplified signal parameters direct the amplifier 9 to amplify the unidirectional read signal to a specific signal amplitude; and the demodulation behavior parameters instruct the demodulator 8 to demodulate the modulation information in the modulated signals to acquire the behavior of the read signals to be acquired.
Preferably, the chip is a quantum chip.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has reasonable design and convenient use, and can improve the chip measurement efficiency under the conditions of the limitation of the space and the refrigeration power of low-temperature equipment and the limited number of transmission cables available in the low-temperature equipment;
2. the invention reduces the dependence of the chip on the cable of the low-temperature equipment, and can adapt to the low-temperature environment of 20 mk;
3. the invention can effectively improve the chip measurement efficiency in a low-temperature environment, and can be well applied to the measurement and feedback of the trial-manufactured multi-quantum chip.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic flow chart of the present invention.
FIG. 2 is a block diagram illustrating the present invention.
Fig. 3 is a design diagram of a quantum chip measurement expansion device.
FIG. 4 is a schematic diagram of signals generated by the measurement module.
In the drawings
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the bit state measurement reading apparatus suitable for a multi-quantum computer chip according to the present invention includes: the microwave switch chip selection module comprises a measurement module, a reading module and a microwave switch chip selection module; the measurement module is respectively connected with the reading module and the microwave switch chip selection module, and the reading module is connected with the microwave switch chip selection module; a measurement module: acquiring a measuring signal for exciting the quantum chip according to the pulse signal; the microwave switch chip selection module: sending the measuring signal to an input port of a specific chip; according to the measurement signal, a specific chip is appointed to respond, and a reading signal is output; a reading module: acquiring an acquired read signal according to the read signal and the data acquisition signal; the data acquisition signal directs the act of data acquisition by the data acquisition card. The measuring module generates a proper measuring signal for exciting the quantum chip, the measuring signal is sent to the input end of the appointed chip through the microwave switch, the appointed quantum chip responds to the measuring signal to generate a reading signal, and the reading signal generated by the chip is sent to the reading module through the microwave switch. The reading module processes the reading signal and then collects data through the data collecting card.
The measurement module adopts: an arbitrary waveform generator 1, a microwave source 6, a modulator 2, and a first filter 3; the measurement module includes: a signal generation module: the arbitrary waveform generator 1 generates a pulse signal; the microwave source 6 generates a microwave signal with a specific frequency; a modulation signal module: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter; a first filtering module: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter; the modulation behavior parameters instruct the behavior of the modulator 2 to modulate a pulse signal onto a microwave signal; the first filtering behavior parameter directs the behavior of the first filter 3 to filter out spurious signals generated at the modulator non-linear characteristic. The module is used primarily to generate a measurement signal for exciting the quantum chip. Specifically, in one embodiment, the arbitrary waveform generator 1 generates a pulse signal having a period of 100us and a pulse width of 2 us. The microwave source 6 generates a microwave signal of a specific frequency, and both signals are sent to the modulator 2 through the microwave cable. Under the action of the modulator 2, the pulse signal is modulated onto the microwave signal to obtain a modulated signal. The schematic diagrams of the pulse signal, the microwave signal and the modulated signal are shown in figure 3. The modulated signal passes through a first filter 3 to filter clutter signals generated by the nonlinear characteristic of the modulator, and a relatively pure measurement signal is obtained and used for exciting the quantum chip.
The microwave switch chip selection module adopts: a microwave shunt switch 4, a combination of a plurality of chips and a microwave combiner switch 5; the microwave switch chip selection module comprises: microwave shunt gating module: outputting a measuring signal to a specific chip by using a microwave shunt switch 4; microwave path combining gating module: a specific chip is excited to generate a reading signal; and outputting a reading signal to the reading module by using the microwave combining switch 5. The microwave shunt switch 4 and the microwave combiner switch 5 adopt the following steps: SP 6T.
The single chip measurement of the conventional measurement reading system at least needs to occupy 2 coaxial cables, is limited by the number of transmission cables of cryogenic equipment, and has limited number of chips which can be measured at a time. The invention adopts the multiplexing technology and expands the original 2 coaxial cables which can only carry out single-chip measurement to 6 chip measurements by adding the microwave switch chip selection functional module, thereby improving the chip measurement efficiency and reducing the measurement cost. Specifically, in one embodiment, the microwave switch chip select module consists essentially of two SP6T microwave switches. The measuring signal enters from the common end of the microwave switch and controls the opening and closing of the microwave switch. And then selectively outputting the measuring signal from a certain shunt end to the selected chip input end. The response signal generated by the chip output end is connected to the shunt end of another microwave switch, and the signal of a shunt end is selectively communicated with the common end of the switch by controlling the switch to be switched off and switched on, so that the chip selection function is realized. And sending the reading signal to a reading measurement module to read the signal. Through adding the microwave switch chip selection module, the public use of the measurement module and the reading module is realized, and therefore the cable requirement of the chip on low-temperature equipment is reduced. In addition, it should be noted that the selection of the microwave switch and the control cable, a microwave switch with an operating temperature as low as 20mK is not found in the market at present, in this scheme, an R591 series SP6D microwave switch of radiall is selected, the operating frequency of the microwave switch is from DC to 26.5GHz, the control voltage is 28V, the coil resistance at normal temperature is 250 ohms, the switching current is 110mA, and the operating temperature is: minus 40 ℃ to plus 85 ℃. Tests show that at the temperature of 20mK, the coil resistance of a common copper wire and a microwave switch can be superconducting, and then a 28V voltage line is added for switching control, so that the current on the coil resistance can be increased to cause the coil to be burnt. For example, 6 quantum chips are measured, 12 coaxial cables are needed when a microwave switch chip selection module is not added, 6 sets of measurement and reading function modules are needed, and after the scheme is adopted, only 2 coaxial cables are needed, and 1 set of measurement and reading function module can be completed.
The reading module adopts: an isolator 11, a second filter 10, a low noise amplifier 9, a demodulator 8, an acquisition card 7 and a microwave source 6; the reading module includes: the unidirectional gating module: according to the reading signal, the isolator 11 is utilized to transmit the reading signal to the load direction, and a one-way reading signal is obtained; a second filtering module: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter; an amplification module: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter; a demodulation module: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter; a data acquisition module: acquiring a data acquisition signal according to a read signal to be acquired and a data acquisition parameter; the second filtering behavior parameter directs the behavior of the second filter 10 to filter out clutter signals; the amplified signal parameters direct the amplifier 9 to amplify the unidirectional read signal to a specific signal amplitude; and the demodulation behavior parameters instruct the demodulator 8 to demodulate the modulation information in the modulated signals to acquire the behavior of the read signals to be acquired. Specifically, in one embodiment, the response signal generated by the quantum chip after being excited by the microwave measurement signal passes through an isolator, which is a device for transmitting the microwave signal in one direction, and when the microwave signal is transmitted in the forward direction, power can be fed to the load, and the reflected wave from the load is greatly attenuated. The filter is used for suppressing useless clutter signals and improving the quality of response signals. The response signal generated by the quantum chip is very weak, about-100 dBm. The power of the signal needs to be increased through a low noise amplifier, and the noise power is reduced as much as possible. The gain of the amplifier is 40dB, after the signal is amplified by 1 ten thousand times through the amplifier, the signal is sent to the demodulator for demodulation to obtain a low-frequency modulation signal, and the low-frequency modulation signal is digitally collected through the collecting card so as to be convenient for subsequent processing and calculation of the signal.
The measuring module, the reading module, the microwave switch chip selection module and the internal components of each module are connected by microwave coaxial cables; the microwave coaxial cable adopts 6J40 constantan enameled wire. The constantan enameled wire made of the material 6J40 is selected as the control cable, the internal resistance of the constantan enameled wire made of the material is small along with the temperature change, the constantan enameled wire can be generally suitable for normal temperature and low temperature work, and does not enter a superconducting region at the temperature of 20 mK. By selecting constantan enameled wires with proper diameter of 6J40 as control cables, the variation difference of the wire package resistance caused by the temperature change of the microwave switch is reduced. The microwave switch can be suitable for the purpose of low temperature of 20 mK.
The bit state measurement reading device suitable for the multi-quantum computer chip provided by the invention can be understood as an embodiment of the bit state measurement reading method suitable for the multi-quantum computer chip provided by the invention by those skilled in the art. That is, the bit state measurement reading method suitable for the multiple quantum computer chip can be realized by executing the bit state measurement reading device suitable for the multiple quantum computer chip.
The invention provides a bit state measurement reading method suitable for a multi-quantum computer chip, which is characterized by comprising the following steps: measuring, reading and microwave switch chip selection; a measurement step: acquiring a measuring signal for exciting the quantum chip according to the pulse signal; a microwave switch chip selection step: sending the measuring signal to an input port of a specific chip; according to the measurement signal, a specific chip is appointed to respond, and a reading signal is output; a reading step: acquiring an acquired read signal according to the read signal and the data acquisition signal; the data acquisition signal directs the act of data acquisition by the data acquisition card.
The measuring step comprises: a signal generating step: the arbitrary waveform generator 1 generates a pulse signal; the microwave source 6 generates a microwave signal with a specific frequency; a signal modulation step: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter; a first filtering step: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter; the modulation behavior parameters instruct the behavior of the modulator 2 to modulate a pulse signal onto a microwave signal; the first filtering behavior parameter directs the behavior of the first filter 3 to filter out spurious signals generated at the modulator non-linear characteristic.
The microwave switch chip selection step comprises: microwave shunt gating: outputting a measuring signal to a specific chip by using a microwave shunt switch 4; microwave combining and gating: a specific chip is excited to generate a reading signal; and outputting a reading signal to the reading step by using a microwave combining switch 5. The microwave shunt switch 4 and the microwave combiner switch 5 adopt the following steps: SP 6T.
The reading step includes: a one-way gating step: according to the reading signal, the isolator 11 is utilized to transmit the reading signal to the load direction, and a one-way reading signal is obtained; a second filtering step: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter; an amplification step: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter; a demodulation step: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter; a data acquisition step: acquiring a data acquisition signal according to a read signal to be acquired and a data acquisition parameter; the second filtering behavior parameter directs the behavior of the second filter 10 to filter out clutter signals; the amplified signal parameters direct the amplifier 9 to amplify the unidirectional read signal to a specific signal amplitude; and the demodulation behavior parameters instruct the demodulator 8 to demodulate the modulation information in the modulated signals to acquire the behavior of the read signals to be acquired.
The chip is a quantum chip.
The invention has reasonable design and convenient use; the invention reduces the dependence of the chip on the cable of the low-temperature equipment, and can adapt to the low-temperature environment of 20 mk; the invention can effectively improve the chip measurement efficiency in a low-temperature environment, and can be well applied to the measurement and feedback of the trial-manufactured multi-quantum chip.
Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (4)
1. A bit state measurement reading device suitable for a multi-quantum computer chip is characterized by comprising: the microwave switch chip selection module comprises a measurement module, a reading module and a microwave switch chip selection module;
the measurement module is respectively connected with the reading module and the microwave switch chip selection module, and the reading module is connected with the microwave switch chip selection module;
a measurement module: acquiring a measuring signal for exciting the quantum chip according to the pulse signal;
the microwave switch chip selection module: sending the measurement signal to an input port of the quantum chip;
according to the measurement signal, designating the quantum chip to respond and outputting a reading signal;
a reading module: acquiring an acquired read signal according to the read signal and the data acquisition signal;
the data acquisition signal guides the behavior of data acquisition through a data acquisition card;
the measurement module adopts: an arbitrary waveform generator (1), a microwave source (6), a modulator (2) and a first filter (3);
the measurement module includes:
a signal generation module: an arbitrary waveform generator (1) generates a pulse signal;
the microwave source (6) generates a microwave signal with a specific frequency;
a modulation signal module: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter;
a first filtering module: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter;
the modulation behavior parameter instructs the behavior of the modulator (2) to modulate a pulse signal onto a microwave signal;
the first filtering behaviour parameter directs the behaviour of the first filter (3) to filter out spurious signals generated at the modulator non-linear characteristic;
the microwave switch chip selection module adopts: the microwave branching switch (4), the combination of a plurality of quantum chips and the microwave combining switch (5);
the microwave switch chip selection module comprises:
microwave shunt gating module: outputting a measuring signal to the quantum chip by using the microwave shunt switch (4);
microwave path combining gating module: the quantum chip generates a reading signal after being excited;
outputting a reading signal to a reading module by using a microwave combining switch (5);
the microwave shunt switch (4) and the microwave combiner switch (5) adopt the following steps: SP 6T.
2. The bit state measurement reading device suitable for the multi-quantum computer chip according to claim 1, wherein the reading module adopts: the device comprises an isolator (11), a second filter (10), a low noise amplifier (9), a demodulator (8), an acquisition card (7) and a microwave source (6);
the reading module includes:
the unidirectional gating module: according to the reading signal, the reading signal is transmitted to the load direction by using an isolator (11) to obtain a one-way reading signal;
a second filtering module: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter;
an amplification module: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter;
a demodulation module: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter;
a data acquisition module: acquiring a read signal after acquisition according to the read signal to be acquired and a data acquisition signal;
the second filtering behaviour parameter instructs the behaviour of the second filter (10) to filter out clutter signals;
the amplified signal parameters direct the amplifier (9) to amplify the unidirectional read signal to a behavior of a specific signal amplitude;
and the demodulation behavior parameters guide the demodulator (8) to demodulate the modulation information in the modulated signals and acquire the behaviors of the read signals to be acquired.
3. The bit state measuring and reading device suitable for the MQR chip of claim 1, wherein the measuring module, the reading module, the microwave switch chip selecting module and the internal components of each module are connected by microwave coaxial cables;
the microwave coaxial cable adopts 6J40 constantan enameled wire.
4. A bit state measurement reading method suitable for a multi-quantum computer chip is characterized by comprising the following steps: measuring, reading and microwave switch chip selection;
a measurement step: acquiring a measuring signal for exciting the quantum chip according to the pulse signal;
a microwave switch chip selection step: sending the measurement signal to an input port of the quantum chip;
according to the measurement signal, designating the quantum chip to respond and outputting a reading signal;
a reading step: acquiring an acquired read signal according to the read signal and the data acquisition signal;
the data acquisition signal guides the behavior of data acquisition through a data acquisition card;
the measuring step comprises:
a signal generating step: an arbitrary waveform generator (1) generates a pulse signal;
the microwave source (6) generates a microwave signal with a specific frequency;
a signal modulation step: acquiring a modulated signal according to the pulse signal, the microwave signal and the modulation behavior parameter;
a first filtering step: acquiring a measuring signal according to the modulated signal and the first filtering behavior parameter;
the modulation behavior parameter instructs the behavior of the modulator (2) to modulate a pulse signal onto a microwave signal;
the first filtering behaviour parameter directs the behaviour of the first filter (3) to filter out spurious signals generated at the modulator non-linear characteristic;
the reading step includes:
a one-way gating step: according to the reading signal, the reading signal is transmitted to the load direction by using an isolator (11) to obtain a one-way reading signal;
a second filtering step: acquiring a filtered one-way read signal according to the one-way read signal and the second filtering behavior parameter;
an amplification step: acquiring the amplified and filtered one-way read signal according to the filtered one-way read signal and the amplified signal parameter;
a demodulation step: acquiring a signal to be acquired and read according to the amplified and filtered unidirectional read signal and the demodulation behavior parameter;
a data acquisition step: acquiring a data acquisition signal according to a read signal to be acquired and a data acquisition parameter;
the second filtering behaviour parameter instructs the behaviour of the second filter (10) to filter out clutter signals;
the amplified signal parameters direct the amplifier (9) to amplify the unidirectional read signal to a behavior of a specific signal amplitude;
and the demodulation behavior parameters guide the demodulator (8) to demodulate the modulation information in the modulated signals and acquire the behaviors of the read signals to be acquired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775561.1A CN110649976B (en) | 2019-08-21 | 2019-08-21 | Bit state measuring and reading device and method suitable for multi-quantum computer chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775561.1A CN110649976B (en) | 2019-08-21 | 2019-08-21 | Bit state measuring and reading device and method suitable for multi-quantum computer chip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110649976A CN110649976A (en) | 2020-01-03 |
| CN110649976B true CN110649976B (en) | 2021-08-17 |
Family
ID=68990230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910775561.1A Active CN110649976B (en) | 2019-08-21 | 2019-08-21 | Bit state measuring and reading device and method suitable for multi-quantum computer chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110649976B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111565050B (en) * | 2020-04-17 | 2021-09-17 | 中国计量科学研究院 | Superconducting quantum digital-to-analog conversion circuit and quantum voltage noise source device |
| CN114062887B (en) * | 2020-07-30 | 2023-03-31 | 合肥本源量子计算科技有限责任公司 | Quantum chip testing method, device and system and storage medium |
| CN113761334A (en) * | 2020-11-13 | 2021-12-07 | 北京沃东天骏信息技术有限公司 | Visual recommendation method, device, equipment and storage medium |
| CN114764617A (en) * | 2020-12-31 | 2022-07-19 | 华为技术有限公司 | Superconducting qubit control device |
| CN113126869B (en) * | 2021-03-30 | 2022-03-18 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Method and system for realizing KVM image high-speed redirection based on domestic BMC chip |
| CN115598489B (en) * | 2021-06-28 | 2024-04-05 | 本源量子计算科技（合肥）股份有限公司 | Quantum bit parameter measuring method and device and quantum chip testing method |
| CN115902572B (en) * | 2021-09-28 | 2024-06-14 | 本源量子计算科技（合肥）股份有限公司 | Quantum chip testing system and quantum computer |
| CN114326494B (en) * | 2021-12-21 | 2024-06-25 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Quantum measurement and control system and method for superconducting quantum computer |
| CN114362766B (en) * | 2021-12-30 | 2024-02-23 | 深圳量旋科技有限公司 | Radio frequency circuit board for superconducting qubit measurement and control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109327190A (en) * | 2018-09-29 | 2019-02-12 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Multi-quantum bit regulation and control reading device |
| WO2019073290A1 (en) * | 2017-10-12 | 2019-04-18 | International Business Machines Corporation | Reducing the number of input lines to superconducting quantum processors installed inside dilution refrigerators |
| CN109685216A (en) * | 2019-01-11 | 2019-04-26 | 清华大学 | A kind of quantum computer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10037493B2 (en) * | 2013-10-22 | 2018-07-31 | D-Wave Systems Inc. | Universal adiabatic quantum computing with superconducting qubits |
| CN109800882B (en) * | 2018-12-28 | 2020-10-09 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Extended feedback measurement device for multi-bit superconducting qubits |
-
2019
- 2019-08-21 CN CN201910775561.1A patent/CN110649976B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019073290A1 (en) * | 2017-10-12 | 2019-04-18 | International Business Machines Corporation | Reducing the number of input lines to superconducting quantum processors installed inside dilution refrigerators |
| CN109327190A (en) * | 2018-09-29 | 2019-02-12 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Multi-quantum bit regulation and control reading device |
| CN109685216A (en) * | 2019-01-11 | 2019-04-26 | 清华大学 | A kind of quantum computer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110649976A (en) | 2020-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110649976B (en) | Bit state measuring and reading device and method suitable for multi-quantum computer chip | |
| CN109800882B (en) | Extended feedback measurement device for multi-bit superconducting qubits | |
| EP2577872B1 (en) | Quantum logic gates utilizing resonator mediated coupling | |
| US6608518B2 (en) | Superconducting single flux quantum circuit | |
| JP2019047126A (en) | Flux control of qubit under resonant excitation | |
| CA2993006A1 (en) | Techniques of oscillator state manipulation for quantum information processing and related systems and methods | |
| CN113934680B (en) | On-chip two-bit gate system and implementation method thereof | |
| JP4134202B2 (en) | Superconducting single flux quantum modulation circuit | |
| JP5414031B2 (en) | AC voltage generating circuit using Josephson element and AC voltage standard circuit | |
| US11422958B2 (en) | Systems and methods for efficient input and output to quantum processors | |
| CN113037294B (en) | Multiple quantum bit control device and method based on superconducting electronics | |
| JP2009049631A (en) | Element state readout apparatus, method, and transmission type josephson resonant circuit | |
| Razmkhah et al. | Superconductor modulation circuits for qubit control at microwave frequencies | |
| Ovaska et al. | Evolutionary-programming-based optimization of reduced-rank adaptive filters for reference generation in active power filters | |
| Niu et al. | Stochastically approximated multiobjective optimization of dual input digital Doherty power amplifier | |
| US20210232364A1 (en) | Systems and methods for variable bandwidth annealing | |
| CN114696905B (en) | Programmable I Xin Ji and method for solving combination optimization problem and cryptography problem | |
| Inamdar et al. | Superconducting switching amplifiers for high speed digital data links | |
| CN114696906B (en) | Photoelectric oscillation type Xin Ji and combination optimization problem solving method | |
| CN113721407A (en) | Optical domain signal logic gate implementation method and device | |
| Xu et al. | Quasi-synchronization of stochastic heterogeneous networks via intermittent pinning sampled-data control | |
| CN113517932A (en) | Optical convolution signal processing system and method based on cascade modulator | |
| Sharma et al. | Automated time domain modeling of linear and nonlinear microwave circuits using recurrent neural networks | |
| CN110632762B (en) | Device for generating chaotic light based on feedback interference principle | |
| CN110764735B (en) | True random number generator based on self-feedback chaotic light |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |