CN109961149A - A kind of addressing control system - Google Patents
A kind of addressing control system Download PDFInfo
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- CN109961149A CN109961149A CN201910222051.1A CN201910222051A CN109961149A CN 109961149 A CN109961149 A CN 109961149A CN 201910222051 A CN201910222051 A CN 201910222051A CN 109961149 A CN109961149 A CN 109961149A
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Abstract
A kind of addressing control system, comprising: the first acousto-optic processing component and rising tone light processing component；Wherein, the first acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；Rising tone light processing component is used for: being determined the exit direction of each dimension of diffracted beam generated, and is exported diffracted beam according to determining exit direction, to carry out the addressing manipulation of the quantum bit array of default value dimension；Wherein, the first rf frequency of the diffracted beam that the first acousto-optic processing component generates, the second rf frequency of the diffracted beam for exporting to rising tone light processing component difference exit direction compensate.The embodiment of the present invention simplifies addressing operation system architecture.
Description
Technical field
Present document relates to but be not limited to quantum computer technical field, espespecially a kind of addressing control system.
Background technique
Quantum computer is a kind of equipment for carrying out Universal Quantum calculating and simulation using Quantum logic gates, is also located at this stage
In the research and development test phase of prototype.Currently, physically realize that the major experimental platform of quantum computer has: ion trap, superconduction
And diamond colour center etc..The base logic cell of quantum computer is made of the quantum bit for abiding by principle of quantum mechanics, largely
Can the quantum bit of coherent manipulation quantum computer physically may be implemented.Relative to traditional computer, quantum computer exists
Operation time can be greatly reduced when solving particular problem；The quantum computer that small-scale quantum bit is constituted can be used for
Complete the calculating task that some classic computers cannot achieve.Therefore, quantum computer basic scientific research, artificial intelligence,
Material simulation, information security, financial market optimization and climate change prediction etc. are with important application prospects, thus by
Extensive concern.How to realize that quantum computer is the research in the subject crossings fields such as present physical, computerized information science
One of hot spot.
Using ion quantum bit-array of the imprison in ion trap, various high guarantors can be realized under existing experiment condition
The quantum logic door operation really spent is one of the main direction of studying for realizing quantum computer.Ion quantum bit is in phase interaction
Controllability, long coherence time, high fidelity quantum logic door operation and quantum error correction etc. are very outstanding, are most to have
One of platform of quantum computer can be able to achieve and (quantum computer formed based on ion quantum bit is referred to as ion herein
Type quantum computer).Quantum bit basic logic door operation on ionic quantum computer mainly passes through laser or micro-
Wave is realized；The addressing control system realized and be directed to ion quantum bit how is designed, is to realize ionic quantum computer
One of Key technique problem, to the complexity of ionic quantum computer system, the speed of gate operation and fidelity, quantum
The problems such as occupancy for the flexibility and physical resource that algorithm designs, suffers from important influence.It is continuous with quantum bit number
Increase, the performance requirement of addressing control system is greatly promoted；It is expansible big that high performance addressing control system becomes realization
The key of scale ionic quantum computer.Currently, there are mainly two types of the addressing systems of common ion quantum bit；Fig. 1 (a)
Pass through the acousto-optic modulator of multichannel as shown in Fig. 1 (a) for the addressing operation schematic diagram of ion quantum bit in the related technology
(AOM) quantum bit addressing manipulation is carried out；Shift frequency is carried out on each channel of the multiple laser of incidence while incident multichannel AOM
Deflection, modulated one order diffracted spots are incident on corresponding ion by optical system；The addressing of single ion quantum bit
Manipulation corresponds to the control in single channel in the AOM；Wherein, each addressable channels needs are driven by independent electronic system.With
Need the quantum bit that manipulates to increase, the port number and electronic system of AOM needed for system also linearly increases, and makes quantum meter
Calculation machine addressing control system becomes very huge and complicated, will greatly reduce the reliability of whole system.Fig. 1 (b) is correlation
The addressing operation schematic diagram of another ion quantum bit in technology, as shown in Fig. 1 (b), devised on wafer ion trap 3 it is micro-
Wave field (MW), the gradient magnetic field generated using microwave electrodes in ion trap imprison region.Different diameters of the ion in potential well
To position, the jump frequency between Zeeman magnetic sublevel is with change of magnetic field strength.The microwave frequency adjusted in microwave electrodes can
The ion of different radial positions is addressed with realization and quantum manipulates；In order to generate biggish gradient magnetic, ion and micro-
The distance of wave electrode is very close (30 microns)；Therefore the program is only applicable to the wafer ion trap of particular design；Due to from
Son is very close with the electrode of chip, and the electric field noise of chip surface can greatly reduce the coherence time of quantum bit, and seek
It needs to change electric field during location by ion deflection axial direction, therefore the micromotion of ion can be introduced, to reduce quantum coherent behaviour
The fidelity of work.
To sum up, scheme is manipulated for above-mentioned ion quantum bit address, by with the increase of quantum bit number, to realization
Optics needed for the addressing control system or microwave system design, control the complexity of electronic system design and logic control program
Rapid growth can be also presented in degree, constrain extensive quantum Computer Design and realize.
Summary of the invention
It is the general introduction to the theme being described in detail herein below.This general introduction is not the protection model in order to limit claim
It encloses.
The embodiment of the present invention provides a kind of addressing control system, being capable of simplified addressing operating system framework.
The embodiment of the invention provides a kind of addressing control systems, comprising: at the first acousto-optic processing component and the second acousto-optic
Manage component；Wherein,
First acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；
Rising tone light processing component is used for: determining the exit direction of each dimension of diffracted beam generated, and according to determination
Exit direction export diffracted beam, with carry out default value dimension quantum bit array addressing manipulation；
Wherein, the first rf frequency of the diffracted beam that the first acousto-optic processing component generates, for the second acousto-optic
Second rf frequency of the diffracted beam of processing component difference exit direction output compensates.
Optionally, the first acousto-optic processing component includes: acousto-optic modulator AOM, polarization beam apparatus PBS, a quarter
Wave plate, light barrier convex lens and the reflecting mirror of wavelength；Wherein, the AOM is set to the focal position of the convex lens；Described four
The wave plate of/mono- wavelength is set between the PBS and the AOM；
The PBS receives incident linearly polarized laser beam, and the linearly polarized laser beam received is incident on described four
The wave plate of/mono- wavelength, after being incident on the AOM after the quarter-wave wave plate, generate the first diffraction light and
Zero order light；
After the zero order light generated is blocked by light barrier, the first-order diffraction light of generation is sent to described
Convex lens, by returning to the AOM after the convex lens and reflecting mirror to generate the diffracted beam；
After the diffracted beam of generation is carried out deflection rotation by the wave plate, by after PBS with Prague
(Bragg) rising tone light processing component is incident at angle.
Optionally, the rising tone light processing component includes: default value acousto-optic deflection device AOD.
Optionally, when the default value is 2, the rising tone light processing component includes: orthogonal two AOD,
And the wave plate for the half wavelength being set between two AOD.
Optionally, the addressing operating system further includes driving unit, is used for:
Determine the first rf frequency of the AOM and the second rf frequency of each AOD；
According to determining first rf frequency, it is driven through the AOM and exports the diffracted beam；
Each AOD is driven according to determining second rf frequency, to determine that the diffracted beam is each by the AOD
The exit direction of dimension.
Optionally, when the default value is 1, first rf frequency multiplied by 2, with second rf frequency
With, One-dimensional Quantum bit-array addressing manipulation when remain unchanged.
Optionally, when the default value is 2,
First rf frequency multiplied by 2, with all second rf frequencies and, in the addressing of two-dimentional quantum bit array
It is remained unchanged when manipulation.
Optionally, the driving unit is used to determine the first rf frequency of the AOM and the second radio frequency of each AOD
Frequency includes:
According to the spatial distribution of quantum bit array, the second rf frequency of each AOD and the first radio frequency of the AOM are determined
Frequency.
Optionally, the addressing operating system further includes real-time adjustment unit, is used for:
According to quantum algorithm and Quantum Error Correcting Codes, the addressing manipulation of the quantum bit array of default value dimension is carried out.
Optionally, the rising tone light processing component, which is used to export diffracted beam according to determining exit direction, includes:
Addressing operation to two or more quantum bits in signal period, sets strategy according to the preset time
Determine the time of the addressing operation of each quantum bit；According to the time that the addressing of determining each quantum bit operates, using the time-division
Multiplexing method exports the diffracted beam for determining exit direction, to carry out addressing operation to each quantum bit.
Compared with the relevant technologies, technical scheme includes: the first acousto-optic processing component and rising tone light processing component；
Wherein, the first acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；Rising tone light processing
Component is used for: being determined the exit direction of each dimension of diffracted beam generated, and is exported diffraction light according to determining exit direction
Beam, to carry out the addressing manipulation of default value dimension quantum bit array；The diffraction light that the first acousto-optic processing component generates
First rf frequency of beam, the second radio frequency frequency of the diffracted beam for being exported to rising tone light processing component difference exit direction
Rate compensates.The embodiment of the present invention simplifies addressing operation system architecture.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 (a) is the addressing operation schematic diagram of ion quantum bit in the related technology；
Fig. 1 (b) is the addressing operation schematic diagram of another ion quantum bit in the related technology；
Fig. 2 is the structural block diagram that the embodiment of the present invention addresses control system；
Fig. 3 is structural block diagram of the present invention using the addressing operating system of example One-dimensional Quantum bit；
Fig. 4 is structural block diagram of the present invention using the addressing operating system of example two dimension quantum bit；
Fig. 5 is the schematic diagram that the present invention applies example time pulse sequence；
Fig. 6 is the quantum bit being addressed using example track schematic diagram in phase space of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Fig. 2 is the structural block diagram that the embodiment of the present invention addresses control system, as shown in Figure 2, comprising: the first acousto-optic processing group
Part and rising tone light processing component；Wherein,
First acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；
Optionally, the first acousto-optic of embodiment of the present invention processing component include: acousto-optic modulator AOM, polarization beam apparatus PBS,
Quarter-wave wave plate, light barrier convex lens and reflecting mirror；Wherein, AOM is set to the focal position of the convex lens；Four
The wave plate of/mono- wavelength is set between PBS and AOM；
The PBS receives incident linearly polarized laser beam, and the linearly polarized laser beam received is incident on described four
The wave plate of/mono- wavelength, after being incident on the AOM after the quarter-wave wave plate, generate the first diffraction light and
Zero order light；
After the zero order light of generation is blocked by light barrier, the first-order diffraction light of generation is sent to convex lens, is passed through
The AOM is returned after convex lens and reflecting mirror to generate the diffracted beam；
After the diffracted beam of generation is carried out deflection rotation by the wave plate, by after PBS with Prague Bragg
It is incident on the rising tone light processing component in angle.
It should be noted that first-order diffraction of embodiment of the present invention light and zero order light are by the way that after convex lens, first-order diffraction light becomes
At parallel with zero order light, zero order light is blocked before passing through convex lens by light barrier.Here, according to the function of component various pieces, originally
Field technical staff is referred to include that optical relative theory determines various pieces (including but not limited to: light barrier, convex lens
And reflecting mirror) position.Zero order light can be realized by other optical modules in addition to light barrier blocks, and does not do herein superfluous
It states.
Rising tone light processing component is used for: determining the exit direction of each dimension of diffracted beam generated, and according to determination
Exit direction export diffracted beam, with carry out default value dimension quantum bit array addressing manipulation.
Optionally, the first rf frequency of the diffracted beam that the first acousto-optic processing component described in the embodiment of the present invention generates,
Second rf frequency of the diffracted beam for exporting to rising tone light processing component difference exit direction compensates.
Optionally, the rising tone of embodiment of the present invention light processing component includes: default value acousto-optic deflection device AOD.
It should be noted that addressing of the addressing operating system of the embodiment of the present invention for One-dimensional Quantum bit-array manipulates
When, rising tone light processing component may include: an AOD；Addressing operating system is used for the addressing behaviour of two-dimentional quantum bit array
When control, rising tone light processing component may include: two AOD.
Optionally, when default value of the embodiment of the present invention is 2, the rising tone light processing component includes: orthogonal
Two AOD, and the wave plate (not shown) of half wavelength being set between two AOD.Here, half wavelength
Wave plate for promoting diffracted beam to export from first AOD after, be input to before second AOD, rotated in polarization direction
90 degree.
It should be noted that utilizing round trip (double pass) light of AOM when default value of the embodiment of the present invention is two
Road and two orthogonal AOD constitute two-dimension addressing scheme；Two are incident on by the re-diffraction light beam of AOM twice
On orthogonal acousto-optic deflection device (AOD), the two-dimensional-array of diffracted beam is may be implemented in the rf frequency for changing AOD.
Optionally, addressing of embodiment of the present invention operating system further includes driving unit, is used for:
Determine the first rf frequency of the AOM and the second rf frequency of each AOD；
According to determining first rf frequency, it is driven through the AOM and exports the diffracted beam；
Each AOD is driven according to determining second rf frequency, to determine that the diffracted beam is each by the AOD
The exit direction of dimension.
Optionally, when default value of the embodiment of the present invention is 1, first rf frequency is multiplied by 2 and second radio frequency
The sum of frequency is remained unchanged in the addressing manipulation of One-dimensional Quantum bit-array.
Optionally, when default value of the embodiment of the present invention is 2,
First rf frequency multiplied by 2, with all second rf frequencies and, in the addressing of two-dimentional quantum bit array
It is remained unchanged when manipulation.
It should be noted that the embodiment of the present invention: when default value is 1, the first rf frequency is multiplied by 2 and the second radio frequency
The sum of frequency, remained unchanged in the addressing manipulation of One-dimensional Quantum bit-array and the first rf frequency multiplied by 2, with all the
The sum of two rf frequencies is remained unchanged in the addressing manipulation of two-dimentional quantum bit array；It can be used as the first rf frequency pair
The compensation basis that second rf frequency compensates.
It should be noted that the embodiment of the present invention changes the second rf frequency υ of acousto-optic deflection deviceRF1It can determine and be used for
The exit direction (by exit direction, can determine Exit positions in conjunction with relative theory) of the diffracted beam of address scan, true
Determine to change the first rf frequency of AOM υ while exit directionM, guarantee 2 υM+υRF1When being worth constant, it may be implemented to grasp in address procedures
The rf frequency of control diffracted beam does not change with the change of exit direction, to meet quantum computer to the one of quantum bit
The requirement of dimension addressing manipulation.The first rf frequency υ that the embodiment of the present invention passes through holding AOMMAnd the second radio frequency of two AOD
Frequency υRF1、υRF2Between 2 υM+υRF1+υRF2Frequency summation is consistent in different Exit positions values, and it is right in the plane to may be implemented
The two-dimension addressing of ion quantum bit manipulates.
Rf frequency of the embodiment of the present invention for the diffracted beam of addressing operation is identical, can be by changing acousto-optic modulation
The rf frequency of device, rf frequency needed for dynamic compensates different location AOD.
Optionally, driving unit of the embodiment of the present invention is used to determine the first rf frequency and each AOD of the AOM
Second rf frequency includes:
According to the spatial distribution of quantum bit array, the second rf frequency of each AOD and the first radio frequency of the AOM are determined
Frequency.
Optionally, addressing operation of embodiment of the present invention system can separately address multiple quantum ratios in array in the time domain
It is special.Addressing operation to two or more quantum bits in signal period, sets strategy according to the preset time and determines
The time of the addressing operation of each quantum bit；According to the time that the addressing of determining each quantum bit operates, using time division multiplexing
Method carries out addressing operation to each quantum bit.Here, addressing of the embodiment of the present invention to quantum bits multiple in signal period
Operation, selects suitable time pulse sequence, can realize the logic between multiple quantum bits using time division multiplexing mode
Door operation.The embodiment of the present invention is addressed to manipulate, realize between arbitrarily quantum bit by the above time division multiplexing mode
Dibit or more bit quantum gate operations.
Optionally, addressing of embodiment of the present invention operating system further includes real-time adjustment unit, is used for:
According to quantum algorithm and Quantum Error Correcting Codes, the addressing manipulation of the quantum bit array of default value dimension is carried out.
It should be noted that addressing operating system of the embodiment of the present invention further includes some other components, such as light barrier,
Reflecting mirror etc. can carry out analysis setting according to the generating process and purpose of diffracted beam by those skilled in the art, herein not
It repeats.
Compared with the relevant technologies, technical scheme includes: the first acousto-optic processing component and rising tone light processing component；
Wherein, the first acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；Rising tone light processing
Component is used for: being determined the exit direction of each dimension of diffracted beam generated, and is exported diffraction light according to determining exit direction
Beam, to carry out the addressing manipulation of the quantum bit array of default value dimension.The embodiment of the present invention simplifies addressing operation system
Framework.
Present invention method is carried out to understand detailed description below by way of using example, is only used for using example old
The present invention is stated, is not intended to limit the scope of protection of the present invention.
Using example
The addressing control system that present invention application example proposes, can be adapted for ion quantum computer, can also apply
In atom or other quantum-bit systems for needing laser to manipulate.Addressing control system both can be used for One-dimensional Quantum bit battle array
Column can be used for two dimension or three-dimensional quantum bit-array.The system can increase the channel capacity of addressing operation system, improve
The addressing operation efficiency of system reduces the complexity of radio-frequency driven module and control unit, eliminates to certain device or special sets
The dependence of physical system is counted, realizes that the one-dimensional addressing with the arbitrarily quantum bit array of higher-dimension manipulates.Present invention application example can
To promote the scale of quantum computer to be in progress and realize.
Fig. 3 is structural block diagram of the present invention using the addressing operating system of example One-dimensional Quantum bit, as shown in figure 3, choosing
Location operating system includes: the wave of single acousto-optic modulator (AOM), single acousto-optic deflection device (AOD), polarization beam apparatus, 1/4 wavelength
Piece convex lens and reflecting mirror；Treatment process includes:
Linearly polarized laser beam is incident on polarization beam apparatus (PBS, Polarized Beam Splitter), by 1/4 wavelength
Wave plate after be again incident on acousto-optic modulator (AOM) generate first-order diffraction light；First-order diffraction light and zero order light pass through convex lens together
Mirror, acousto-optic modulator are placed in the focal position of convex lens, and first-order diffraction light will become parallel with zero order light.Zero order light is in optical path
It is middle to be blocked by blocking element.Backtracking after first-order diffraction light is reflected again passes by AOM and generates diffraction.Re-diffraction generates
Diffracted beam along the light beam backtracking of acousto-optic modulator is incident on for the first time, revolved using the wave plate rear polarizer of 1/4 wavelength
Turn, passes through vertical exit after polarization beam apparatus (PBS).The Double Pass light channel structure of AOM can guarantee changing acousto-optic
First rf frequency υ of modulator (AOM)MWhen diffracted beam exit direction it is constant.Spread out from what acousto-optic modulator optical path was emitted
Irradiating light beam is incident on AOD with the angle Prague (Bragg) (θ), and AOD is in radiofrequency field (Radio Frequency, frequency υRF1,
Wave vector is) driving under, will be incident on AOD diffracted beam generate Bragg diffraction.Diffraction generate zero level hot spot and
Angle between level-one hot spot depends on the rf frequency υ of radiofrequency signal (RF)RF1.Therefore it can control by changing RF frequency
The direction of diffracted beam, to realize that the addressing to different location ion quantum bit manipulates.Address laser scan position and
Range is mainly determined by the centre frequency and bandwidth of operation that drive AOD.Position resolution in bandwidth of operation is also by brilliant in AOD
The factors such as the spread speed of body, the spot size for being incident on AOD are determined.The round trip that present invention application example is made of AOM
The diffracted beam of (Double Pass) optical path outgoing is incident on acousto-optic deflection device (AOD) with the angle Prague (Bragg).Change
The rf frequency υ of AODRF1The position that emergent light can be scanned changes AOM rf frequency υ while scan positionM, guarantee 2 υM
+υRF1Be worth it is constant, thus realize in address procedures manipulate laser frequency not with position change, fully meet quantum computer pair
The requirement of the one-dimensional addressing manipulation of quantum bit.
Fig. 4 is structural block diagram of the present invention using the addressing operating system of example two dimension quantum bit, as shown in figure 4, choosing
Location operating system include: single acousto-optic modulator (AOM), two orthogonal acousto-optic deflection devices (AOD), polarization beam apparatus,
The wave plate convex lens and reflecting mirror of 1/4 wavelength；Present invention application example can use single AOM and two orthogonal AOD
Realize that the addressing to two-dimentional quantum than dot matrix manipulates.Assuming that the laser frequency for being incident on Double Pass optical path is ωL, then
The laser frequency of Double Pass optical output is ωL+2υM, wave vector isThe diffracted beam with Bragg angle (Bragg) again
It is secondary to be incident on first AOD (rf frequency υRF1) on generate positive level-one optical diffraction light (deflection angle be along the phonon propagation side of AOD
To), frequency ωL+2υM+υRF1, the direction of propagation isThe diffraction light is incident on second acousto-optic deflection device
(AOD2) after, (frequency υ under the action of it drives radio frequency 2RF2, wave vector is) generate diffraction light, the diffracted beam
Rf frequency be ωL+2υM+υRF1+υRF2, the direction of propagation are as follows:Due toIt is much larger thanAnd with their near verticals,WithIt is mutually perpendicular to, present invention application example can consider generation
Diffracted beam for addressing operation can beWithPosition array scanning is carried out in the plane of composition, mode is
By the rf frequency υ for changing two AOD of drivingRF1And υRF2, thus it is possible to vary diffracted beam byWithDirection
Inflection point.
The Acoustic Wave Propagation direction of two AOD of present invention application example is respectivelyWithIts diffracted beam generated
Can byWithTwo-dimensional-array is carried out in the plane of composition.By the rf frequency υ for keeping AOMMAnd two
The rf frequency υ of a AODRF1、υRF2Between 2 υM+υRF1+υRF2Be worth it is consistent in different location, may be implemented in the plane to from
The two-dimension addressing of sub- quantum bit manipulates.
Fig. 5 is the schematic diagram that the present invention applies example time pulse sequence, as shown in figure 5, in same period (such as the period
A), different moments choosing when AOM and AOD loads different the first rf frequencies and the second rf frequency respectively, will may be implemented
The ion quantum bit of location manipulation different location.Fig. 6 is the quantum bit of the invention being addressed using example in phase space upper rail
Mark schematic diagram, the momentum for the quantum bit that the abscissa P in figure is indicated, what X ordinate indicated is the position of quantum bit, often
Track of a quantum bit in phase space returns to the starting point of addressing manipulation to form closed loop.It may be implemented to appoint by this method
Dibit or more bit quantum gate operations between meaning quantum bit.
Present invention application example can to quantum computer (including ionic quantum computer) interior arbitrarily quantum bit (including
Ion quantum bit) it is addressed to manipulate.Frequency when AOD difference inflection point is dynamically compensated by changing AOM rf frequency
Rate is poor, guarantees that the frequency of the addressing manipulation laser of different location is completely the same.Laser caused by eliminating because of addressing control system
Frequency fluctuation and the manipulation error introduced, improve the fidelity of Quantum logic gates in quantum computer.It ensure that addressing manipulation
System laser frequency when manipulating to arbitrarily quantum bit does not change with quantum bit position.
Present invention application example may be implemented by time-multiplexed addressing manipulation to arbitrarily quantum ratio on quantum computer
Spy carries out dibit or more bit quantum gate operations.The addressing performance of ion quantum bit control system is mainly by this
The resolution ratio of acousto-optic deflection device (AOD) determines in system.For the acousto-optic deflection device (AOD) used in addressing system, its center
Frequency is υ0, bandwidth of operation is Δ υ, resolution ratio N.Present invention application example can construct N number of letter in the bandwidth of operation of AOD
Road, each channel will correspond to the single ion quantum bit for needing to address in quantum computer.Referring to Fig. 5, although of the invention
The frequency shift (FS) of two positions cannot be compensated simultaneously using acousto-optic modulator single in example system, but can be by time domain
On separately address multiple quantum bits in array, to realize the quantum logic door operation of any bit.In signal period
Different moments are addressed to manipulate for different ion quantum bits, select suitable time pulse sequence that can make simultaneously
The starting point that track of multiple quantum bits in phase space returns to addressing manipulation is obtained, to realize patrolling between multiple quantum bits
Collect door operation.Dibit or more bit quantities between arbitrarily quantum bit may be implemented by time division multiplexing addressing manipulation technology
Sub- gate operation.
The immediate addressing manipulation of musec order may be implemented in present invention application example.Core devices are that control light beam deflects
Acousto-optic deflection device (AOD) and dynamic compensate the acousto-optic modulator (AOM) of position frequency departure, these elements are generally operational in 100,000,000
Hertz frequency range.The rise time of AOD device usually in hundred nanoseconds, can be achieved addressing after selecting suitable device parameters and swash
Switch and timing control in light microsecond (us) time scale, meet the performance requirement of ionic quantum computer.Pass through control
RF signal power is driven, can be realized simultaneously the strength control to addressing laser.
Present invention application example can optimize addressing system performance simultaneously according to the distribution of ion quantum bit in space
It can implement dynamical feedback according to ion position.Present invention application example does not need ion quantum bit and is uniformly distributed in space.
To the one-dimensional ion quantum bit-array of specific distribution in space, as long as meeting two ion energy that distance is nearest in ion chain
Addressing is differentiated in the space AOD (spatial resolution N).Being less than N*l in the length L of entire ion chain, (l is between adjacent ions
Distance) in the range of, present invention application example can according in ion position change driving AOD frequency content (υ0, υ1...
υn), improve ion space position distribution corresponding to the centre frequency of each channel.Present invention application example can according to from
The spatial position distribution of son, come the radio frequency signal frequency distribution for optimizing driving AOD to be addressed required.It is run in quantum algorithm
In the process, if ion quantum bit position changes, present invention application example can according to ion quantum bit position into
The optimization of row Real-time Feedback, may be implemented more complicated quantum algorithm and Quantum Error Correcting Codes.
Present invention application example can be applied to be read out simultaneously the quantum state of arbitrarily quantum bit in quantum computer
Carry out feedback manipulation.In ionic quantum computer, the reading to quantum state is usually to pass through a branch of global detection light and institute
There is quantum bit to interact, carries out quantum state reading by collecting the fluorescence information of all quantum bits.Work as detection
Light passes through addressing control system of the invention, and the selective quantum for reading arbitrarily quantum bit on quantum computer may be implemented
State, and dynamical feedback is carried out to quantum algorithm in operation according to measurement result.It is able to achieve patrolling for fault tolerant according to the present invention
Collect the Quantum Error Correcting Codes of bit algorithm and dynamical feedback.
Muliti-qubit addressability depends on specific implementation in acousto-optic deflection device (AOD) in present invention application example
Selected in the operation wavelength of acousto-optic deflection device (AOD) model, bandwidth of operation, incident diaphragm diameter, the sound in acousto-optic crsytal
The parameters such as speed.But these parameters are only the present invention using the suitable acousto-optic deflection device of example selection (AOD) offer foundation.Into
When row addressing system is adjusted, the angle of incident light and AOD are also required to strictly meet the angle requirement of Bragg diffraction (Bragg).
In actual optical path adjusting, be not able to satisfy ideal operation condition addressing operation system only performance, in terms of have
It is reduced.
In the description of the embodiment of the present invention, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ",
"upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ", " inverse time
The orientation or positional relationship of the instructions such as needle ", " axial direction ", " radial direction ", " circumferential direction " is to be based on the orientation or positional relationship shown in the drawings,
Be merely for convenience of description the present invention, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used
In description purpose, it is not understood to indicate or imply relative importance or implicitly indicates the number of indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.In this hair
In the description of bright embodiment, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise clearly specific limit
It is fixed.
In the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in embodiments of the present invention can be understood as the case may be.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware (such as processor) is completed, and described program can store in computer readable storage medium, as read-only memory,
Disk or CD etc..Optionally, one or more integrated circuits also can be used in all or part of the steps of above-described embodiment
It realizes.Correspondingly, each module/unit in above-described embodiment can take the form of hardware realization, such as pass through integrated electricity
Its corresponding function is realized on road, can also be realized in the form of software function module, such as is stored in by processor execution
Program/instruction in memory realizes its corresponding function.The present invention is not limited to the hardware and softwares of any particular form
In conjunction with.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of addressing control system characterized by comprising the first acousto-optic processing component and rising tone light processing component；Its
In,
First acousto-optic processing component is used for: generating the diffracted beam for default value dimension addressing operation；
Rising tone light processing component is used for: being determined the exit direction of each dimension of diffracted beam generated, and is gone out according to determining
Direction output diffracted beam is penetrated, to carry out the addressing manipulation of the quantum bit array of default value dimension；
Wherein, the first rf frequency of the diffracted beam that the first acousto-optic processing component generates, for rising tone light processing
Second rf frequency of the diffracted beam of component difference exit direction output compensates.
2. addressing operating system according to claim 1, which is characterized in that the first acousto-optic processing component includes: sound
Optical modulator AOM, polarization beam apparatus PBS, quarter-wave wave plate, light barrier convex lens and reflecting mirror；Wherein, described
AOM is set to the focal position of the convex lens；The quarter-wave wave plate be set to the PBS and the AOM it
Between；
The PBS receives incident linearly polarized laser beam, the linearly polarized laser beam received is incident on described four/
The wave plate of one wavelength generates the first diffraction light and zero level after being incident on the AOM after the quarter-wave wave plate
Light；
After the zero order light generated is blocked by light barrier, the first-order diffraction light of generation is sent to the convex lens
Mirror, by returning again to the AOM after the convex lens and reflecting mirror to generate the diffracted beam；
After the diffracted beam of generation is carried out deflection rotation by the wave plate, by being entered after PBS with Prague angle Bragg
It is mapped to the rising tone light processing component.
3. addressing operating system according to claim 1 or 2, which is characterized in that the rising tone light processing component includes:
Default value acousto-optic deflection device AOD.
4. addressing control system according to claim 2, which is characterized in that when the default value is 2, the rising tone
Light processing component includes: orthogonal two AOD, and the wave plate for the half wavelength being set between two AOD.
5. addressing operating system according to claim 1,2 or 4, which is characterized in that the addressing operating system further includes
Driving unit is used for:
Determine the first rf frequency of the AOM and the second rf frequency of each AOD；
According to determining first rf frequency, it is driven through the AOM and exports the diffracted beam；
Each AOD is driven according to determining second rf frequency, to determine each dimension of the diffracted beam by the AOD
Exit direction.
6. addressing operating system according to claim 5, which is characterized in that when the default value is 1, described first is penetrated
Frequent rate multiplied by 2, with second rf frequency and, remained unchanged in the addressing manipulation of One-dimensional Quantum bit-array.
7. addressing operating system according to claim 5, which is characterized in that when the default value is 2,
First rf frequency multiplied by 2, with all second driving frequencies and, manipulated in the addressing of two-dimentional quantum bit array
When remain unchanged.
8. addressing operating system according to claim 1,2 or 4, which is characterized in that the driving unit is for determining institute
Second rf frequency of the first rf frequency and each AOD of stating AOM includes:
According to the spatial distribution of quantum bit array, the second rf frequency of each AOD and the first radio frequency frequency of AOM are determined
Rate.
9. addressing operating system according to claim 1,2 or 4, which is characterized in that the addressing operating system further includes
Real-time adjustment unit, is used for:
According to quantum algorithm and Quantum Error Correcting Codes, the addressing manipulation of the quantum bit array of default value dimension is carried out.
10. addressing operating system according to claim 1,2 or 4, which is characterized in that the rising tone light processing component is used
Include: in exporting diffracted beam according to determining exit direction
Addressing operation to two or more quantum bits in signal period, sets strategy according to the preset time and determines
The time of the addressing operation of each quantum bit；According to the time that the addressing of determining each quantum bit operates, using time division multiplexing
Method exports the diffracted beam for determining exit direction, to carry out addressing operation to each quantum bit.
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| US16/693,325 US11513418B2 (en) | 2019-03-22 | 2019-11-24 | Addressing system, addressing apparatus and computing apparatus |
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