CN217404891U - Radio frequency system applied to quantum computation - Google Patents
Radio frequency system applied to quantum computation Download PDFInfo
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- CN217404891U CN217404891U CN202123272674.1U CN202123272674U CN217404891U CN 217404891 U CN217404891 U CN 217404891U CN 202123272674 U CN202123272674 U CN 202123272674U CN 217404891 U CN217404891 U CN 217404891U
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Abstract
A radio frequency system for use in quantum computing, the radio frequency system for use in quantum computing comprising: a radio frequency source configured to output a radio frequency signal; the power division unit is connected with the radio frequency source and is suitable for outputting a plurality of first signals with the same frequency according to the radio frequency signals; the power division unit is connected with a plurality of quantum computing devices, the plurality of first signals correspond to the plurality of quantum computing devices one to one, and the plurality of first signals are used as local oscillation signals of the plurality of quantum computing devices.
Description
Technical Field
The utility model relates to the field of electronic technology, in particular to use the radio frequency system in quantum computing.
Background
An rf source, also referred to as a microwave source, is generally a signal source that provides rf signals in rf-related applications, either as local oscillator signals or as user-specified signals. The output frequency and output signal power can be set according to user requirements and equipment capabilities. However, the rf source generally has only one channel, and even if the device has multiple outputs, the source of the structure is often multiple channels that are completely independent. When a plurality of radio frequency source devices or a plurality of output channels of one radio frequency source output the same frequency, due to the inconsistency of various internal frequency doubling and frequency modulation elements, the output frequency has frequency difference when being observed for a long time, so that the same frequency is set, and the signal phase difference can change gradually along with the time. Even if the same reference source is used externally to send to different radio frequency sources as reference sources, the situation cannot be avoided.
In some special applications, such as quantum computing, the amount of demand for the radio frequency source is large, and many radio frequency source output channels are required to be used as local oscillators and the like for frequency conversion in the later period. These local oscillators have requirements on the signal energy output by the radio frequency source and on the consistency of the frequency. The requirement for frequency consistency is that the output frequencies of all channels need to be exactly consistent in a long time (often exceeding 24 hours, even from start to end of an experiment), that is, the phase differences of signals need to be completely consistent, and for the phase difference of a radio frequency signal with a GHz magnitude, the variation value of the phase difference needs to be less than 1 degree or even lower, while the requirements of a classical radio frequency source on the frequency identity and the phase difference identity are difficult to meet.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a radio frequency system for quantum computing, so as to at least partially solve at least one of the above-mentioned technical problems.
According to the utility model discloses an embodiment provides a radio frequency system who uses in quantum computing, include:
a radio frequency source configured to output a radio frequency signal; and
the power division unit is connected with the radio frequency source and is suitable for outputting a plurality of paths of first signals with the same frequency according to the radio frequency signals;
the power division unit is connected with the multiple quantum computing devices, multiple paths of first signals correspond to the multiple quantum computing devices one by one, and the multiple paths of first signals serve as local oscillation signals of the multiple quantum computing devices.
According to the utility model discloses an embodiment, the merit divides the unit to include:
the first amplifying structure is connected with the radio frequency source and is suitable for amplifying the radio frequency signal to obtain a first amplified radio frequency signal; and
and the first power division structure is connected with the first amplification structure and is suitable for outputting a plurality of paths of first signals with the same frequency according to the first amplified radio frequency signal.
According to the utility model discloses an embodiment, the merit divides the unit still to include:
the first filtering structure is arranged between the first amplifying structure and the first power dividing structure and is suitable for filtering the first amplified radio-frequency signal.
According to the utility model discloses an embodiment, the merit divides the unit to include:
the second power division structure is connected with the radio frequency source and is suitable for outputting a plurality of paths of second signals with the same frequency according to the radio frequency signals; and
and each second amplification structure is suitable for amplifying the corresponding second signal so as to output multiple paths of first signals with the same frequency.
According to the utility model discloses an embodiment, the merit divides the unit still to include:
and the plurality of second filtering structures are arranged between the second power dividing structures and the second amplifying structures, the plurality of second filtering structures correspond to the plurality of second signals one to one, and each second filtering structure is configured to filter the corresponding second signal.
According to the utility model discloses an embodiment, the merit divides the unit to include:
the third amplifying structure is connected with the radio frequency source and is suitable for amplifying the radio frequency signal to obtain a second amplified radio frequency signal;
the third power division structure is connected with the third amplification structure and is suitable for outputting a plurality of paths of third signals with the same frequency according to the second amplified radio-frequency signal; and
and the plurality of fourth amplification structures correspond to the plurality of paths of third signals one to one, and each fourth amplification structure is configured to amplify the corresponding third signal so as to output the plurality of paths of first signals with the same frequency.
According to the utility model discloses an embodiment, the merit divides the unit still to include:
the third filtering structure is arranged between the third amplifying structure and the third power dividing structure and is suitable for filtering the second amplified radio-frequency signal; and/or
And the fourth filtering structures are arranged between the third power dividing structure and the fourth amplifying structures, the fourth filtering structures correspond to the multiple paths of third signals one by one, and each fourth filtering structure is suitable for filtering the corresponding third signal.
According to the utility model discloses an embodiment, structure is divided to first merit, second merit and third merit divide the structure to include N level merit respectively and divide the module.
According to the utility model discloses an embodiment, the module is divided to N level merit includes:
under the condition that N is 1, the 1 st-stage power division module comprises 1 first power divider, and the first power divider is suitable for outputting multiple paths of first signals with the same frequency;
under the condition that N is larger than 1, the ith power division module comprises a ith power divider, each ith power divider is connected with the i +1 th power divider of the ith +1 th stage to output a plurality of paths of first signals with the same frequency, wherein N is a positive integer, i is more than or equal to 1 and less than N, i is a positive integer, a is more than or equal to 2 and a is a positive integer, b is more than or equal to 2 and b is a positive integer.
According to the utility model discloses an embodiment, the embodiment of the utility model provides a radio frequency system is through dividing the merit to divide unit and radio frequency source to be connected, can make the radio frequency signal of radio frequency source output convert the first signal that multichannel frequency is the same, and the first signal of multichannel has natural coherent characteristic. The method comprises the steps that a power division unit is connected with a plurality of quantum computing devices, so that a plurality of paths of first signals correspond to the plurality of quantum computing devices one by one, and the plurality of paths of first signals can be used as local oscillation signals of the plurality of quantum computing devices.
Drawings
Fig. 1 is a block diagram of a radio frequency system provided according to an embodiment of the present invention;
fig. 2 is a block diagram of a first power division structure provided according to an embodiment of the present invention;
fig. 3 is a block diagram of a second power division structure provided according to an embodiment of the present invention;
fig. 4 is a block diagram of a third power division structure provided in accordance with an embodiment of the present invention;
fig. 5a is a block diagram of a power dividing unit according to an embodiment of the present invention;
fig. 5b is a block diagram of another power dividing unit according to an embodiment of the present invention.
Reference numerals
1 radio frequency source
2 power division unit
3 first amplification Structure
4 first power division structure
5 second power dividing structure
6 second amplifying Structure
7 third amplification Structure
8 third power division structure
9 fourth amplifying Structure
Detailed Description
Based on the inherent defects/weaknesses of the original structure of the classical radio frequency source, namely the requirements of the classical radio frequency source on the same frequency and the consistent phase difference are difficult to meet, and the technology of fixing the phase difference or reducing the change is gradually developed under the promotion of the quantum computing requirement. In addition, in quantum computing, since application of a radio frequency signal generates a predetermined pulse waveform and clearly requires the phase of the final pulse, the requirement for fixing the phase difference of the radio frequency source is also called a coherent requirement. (coherent means that the initial phase between pulses is deterministic, the initial phase of the first pulse may be random, but the phase between the subsequent pulse and the first pulse is deterministic)
The problem to be solved by the coherent is that the frequency/phase does not change with time on the premise of same frequency setting. The conventional solution is to control from the source of the rf generation, but the process of adjusting the frequency of the rf source will bring about the phase change characteristics described earlier. When coherent requirements exist, especially in quantum computing, the required output frequencies are identical.
Therefore, the utility model discloses aim at calculating the demand characteristics to the radio frequency source looks coherence to the quantum, provide a design and concrete realization of multichannel looks coherence radio frequency source.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a block diagram of a radio frequency system according to an embodiment of the present invention.
According to the utility model discloses an embodiment, as shown in FIG. 1, provides a radio frequency system who uses in quantum computing, include: a radio frequency source 1 and a power dividing unit 2.
The radio frequency source 1 is configured to output a radio frequency signal. The rf source 1 is a core of rf signals that can be set in response to a frequency. The power dividing unit 2 is connected with the radio frequency source 1 and is adapted to output multiple paths of first signals with the same frequency according to the radio frequency signals. The power division unit 2 is connected with a plurality of quantum computing devices, the plurality of paths of first signals correspond to the plurality of quantum computing devices one to one, and the plurality of paths of first signals serve as local oscillation signals of the plurality of quantum computing devices.
Fig. 2 is a block diagram of a first power division structure according to an embodiment of the present invention.
As shown in fig. 2, the power dividing unit 2 includes: a first amplifying structure 3 and a first power dividing structure 4. The first amplifying structure 3 is connected to the radio frequency source 1 and adapted to amplify a radio frequency signal to obtain a first amplified radio frequency signal. The first power dividing structure 4 is connected to the first amplifying structure 3, and is adapted to output multiple first signals having the same frequency according to the first amplified rf signal.
According to the utility model discloses an embodiment, the merit is divided unit 2 and is still included first filtering structure (not shown in the figure), and first filtering structure sets up and divides between structure 4 in first enlarged structure 3 and first merit, is applicable to and carries out the filtering to first enlarged radio frequency signal.
Fig. 3 is a block diagram of a second power division structure according to an embodiment of the present invention.
As shown in fig. 3, the power dividing unit 2 includes a second power dividing structure 5 and a plurality of second amplifying structures 6.
The second power division structure 5 is connected to the rf source and adapted to output multiple channels of second signals having the same frequency according to the rf signal. The plurality of second amplifying structures 6 correspond to the plurality of second signals one to one, and each second amplifying structure 6 is adapted to amplify the corresponding second signal to output a plurality of first signals with the same frequency.
The power parameters of the plurality of second amplifying structures 6 can be set uniformly, so as to output a plurality of second signals with the same power in principle, and there will be slight differences among the plurality of second signals actually output.
The power parameters of the second amplifying structures 6 can also be set independently according to actual conditions, so that multiple paths of first signals with the same frequency can be output.
According to the utility model discloses an embodiment, unit 2 is divided to merit still includes a plurality of second filtering structures (not shown in the figure), sets up between second merit divides structure and second enlarged structure, a plurality of second filtering structures and multichannel second signal one-to-one, and every second filtering structure configuration is filtered to the second signal that corresponds.
Fig. 4 is a block diagram of a third power division structure according to an embodiment of the present invention.
As shown in fig. 4, the power dividing unit 2 includes: a third amplifying structure 7, a third power dividing structure 8 and a plurality of fourth amplifying structures 9.
The third amplifying structure 7 is connected to the radio frequency source 1 and is adapted to amplify the radio frequency signal to obtain a second amplified radio frequency signal. The third power dividing structure 8 is connected to the third amplifying structure 7, and is adapted to output a plurality of third signals having the same frequency according to the second amplified radio frequency signal. A plurality of fourth amplifying structures 9 are in one-to-one correspondence with the plurality of third signals, and each fourth amplifying structure 9 is configured to amplify the corresponding third signal to output the plurality of first signals with the same frequency. The power parameters of the plurality of third amplifying structures 7 can be uniformly set, and in principle, the plurality of second amplified radio frequency signals with the same power are output, and in fact, there will be slight differences between the plurality of second amplified signals. The power parameters of the third amplifying structures 7 can also be set independently according to actual conditions, so that multiple paths of second amplified radio-frequency signals with the same frequency can be output.
According to the embodiment of the present invention, the power dividing unit further includes a third filtering structure (not shown in the figure), and the third filtering structure is disposed between the third amplifying structure 7 and the third power dividing structure 8, and is adapted to filter the second amplified radio frequency signal; and/or a plurality of fourth filtering structures (not shown in the figure) disposed between the third power dividing structure 8 and the plurality of fourth amplifying structures 9, where the plurality of fourth filtering structures correspond to the plurality of third signals one to one, and each fourth filtering structure is adapted to filter the corresponding third signal.
According to the utility model discloses an embodiment, structure 4 is divided to first merit, second merit is divided structure 5 and third merit and is divided structure 8 and include the module is divided to N level merit respectively, and the module formation tree structure is divided to N level merit.
According to the utility model discloses an embodiment, the module is divided to N level merit includes:
in the case that N is 1, the 1 st-stage power splitting module includes 1 first power divider, and the first power divider is adapted to output multiple paths of first signals with the same frequency.
Under the condition that N is larger than 1, the ith power division module comprises a ith power divider, each ith power divider is connected with the i +1 th power divider of the ith +1 th level to output multiple paths of first signals with the same frequency, wherein N is a positive integer, i is larger than or equal to 1 and smaller than N, i is a positive integer, a is larger than or equal to 2 and is a positive integer, b is larger than or equal to 2 and is a positive integer. An amplifying structure can be arranged between the N-pole power dividing modules according to actual needs.
According to the utility model discloses an embodiment, power divider has an input channel and a M output channel (divide M power divider for short, M is more than or equal to 1 and M is the positive integer), and signal all the way is exported to every output channel, and M output channel exports the same microwave signal of M frequency. The number of output channels of the power dividers with different specifications is different, and in practical application, the number of output channels can be selected according to practical situations.
According to the utility model discloses an embodiment, in practical application, if need 4 way signal channel, can choose for use a 1 power divider who divides 4, need 5 passageways, can select 1 power divider who divides 5.
The power dividers can also form a multi-level tree structure, if 16 signal channels are needed, the first level can be a 1-to-4 power divider, and then the divided signals are respectively introduced into the 1-to-4 power dividers of the second level, so that the 1-to-16 effect is obtained.
Fig. 5a is a block diagram of a power dividing unit according to an embodiment of the present invention.
Fig. 5b is a block diagram of another power dividing unit according to an embodiment of the present invention.
The power dividing unit 2 may realize the same number of output channels by a combination of different power dividers. If 4 channels are finally needed, as shown in fig. 5a, the 4 channels can be realized by one 1-to-4 power divider, as shown in fig. 5b, or 4 channels can be obtained by one 1-to-2 second power divider of the first pole and then two 1-to-2 power dividers of the second stage.
According to the utility model discloses a radio frequency system that provides is through having connected a merit with the radio frequency source and divides unit 2 for the output channel of radio frequency source 1 increases by a wide margin, and can provide natural coherent characteristic, satisfies fields such as quantum computation to the demand of coherent radio frequency source.
According to the utility model discloses an embodiment still provides a method for utilizing radio frequency system to produce local oscillator signal as above, include: outputting a radio frequency signal by using a radio frequency source 1; the power division unit 2 is used for converting the radio frequency signals into a plurality of first signals with the same frequency, and the plurality of first signals are used as local oscillation signals of the plurality of quantum computing devices.
The above-mentioned embodiments, which further illustrate the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A radio frequency system for use in quantum computing, comprising:
a radio frequency source configured to output a radio frequency signal; and
the power division unit is connected with the radio frequency source and is suitable for outputting a plurality of paths of first signals with the same frequency according to the radio frequency signals;
the power division unit is connected with a plurality of quantum computing devices, a plurality of paths of first signals correspond to the plurality of quantum computing devices one to one, and the plurality of paths of first signals are used as local oscillation signals of the plurality of quantum computing devices.
2. The radio frequency system of claim 1, wherein the power division unit comprises:
the first amplification structure is connected with the radio frequency source and is suitable for amplifying the radio frequency signal to obtain a first amplified radio frequency signal; and
and the first power division structure is connected with the first amplification structure and is suitable for outputting multiple paths of first signals with the same frequency according to the first amplified radio-frequency signals.
3. The radio frequency system of claim 2, wherein the power division unit further comprises:
and the first filtering structure is arranged between the first amplifying structure and the first power dividing structure and is suitable for filtering the first amplified radio-frequency signal.
4. The radio frequency system of claim 1, wherein the power dividing unit comprises:
the second power division structure is connected with the radio frequency source and is suitable for outputting a plurality of paths of second signals with the same frequency according to the radio frequency signals; and
and the plurality of second amplification structures correspond to the plurality of paths of second signals one to one, and each second amplification structure is suitable for amplifying the corresponding second signal so as to output the plurality of paths of first signals with the same frequency.
5. The radio frequency system of claim 4, wherein the power division unit further comprises:
and a plurality of second filtering structures disposed between the second power dividing structure and the second amplifying structure, where the plurality of second filtering structures correspond to the plurality of second signals one to one, and each second filtering structure is configured to filter the corresponding second signal.
6. The radio frequency system of claim 1, wherein the power division unit comprises:
the third amplifying structure is connected with the radio frequency source and is suitable for amplifying the radio frequency signal to obtain a second amplified radio frequency signal;
the third power division structure is connected with the third amplification structure and is suitable for outputting a plurality of paths of third signals with the same frequency according to the second amplified radio frequency signal; and
a plurality of fourth amplification structures, the plurality of fourth amplification structures corresponding to the plurality of third signals one-to-one, each of the fourth amplification structures being configured to amplify the corresponding third signal to output a plurality of first signals having the same frequency.
7. The radio frequency system of claim 6, wherein the power division unit further comprises:
a third filtering structure, disposed between the third amplifying structure and the third power dividing structure, and adapted to filter the second amplified radio frequency signal; and/or
And a plurality of fourth filtering structures disposed between the third power dividing structure and the plurality of fourth amplifying structures, where the plurality of fourth filtering structures correspond to the plurality of third signals one to one, and each fourth filtering structure is adapted to filter the corresponding third signal.
8. The radio frequency system of claim 2, wherein the first power division structure comprises an N-stage power division module.
9. The radio frequency system of claim 4, wherein the second power division structure comprises an N-stage power division module.
10. The radio frequency system of claim 6, wherein the third power division structure comprises an N-stage power division module.
11. The radio frequency system of any one of claims 8-10, wherein the N-stage power division module comprises:
under the condition that N is 1, the 1 st-stage power division module comprises 1 first power divider, and the first power divider is suitable for outputting multiple paths of the first signals with the same frequency;
under the condition that N is larger than 1, the ith power division module comprises a ith power divider, each ith power divider is connected with the i +1 th power divider of the ith +1 th level to output the first signals with the same multi-channel frequency, N is a positive integer, i is larger than or equal to 1 and smaller than N, i is a positive integer, a is larger than or equal to 2 and is a positive integer, b is larger than or equal to 2 and is a positive integer.
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