Quantum space transmission channel based on quantum computer

Abstract

The utility model provides a quantum space transmission channel based on a quantum computer, which relates to the technical field of quantum computers and comprises a pulse generator, a low-temperature vacuum tank, a first photoelectric conversion device, an optical lens, a light-transmitting optical glass group, a second photoelectric conversion device and a quantum chip, the light-transmitting optical glass group comprises first light-transmitting optical glass, second light-transmitting optical glass, third light-transmitting optical glass and fourth light-transmitting optical glass; the pulse generator is placed outside the low-temperature vacuum tank, the first photoelectric conversion device is arranged at the top of the low-temperature vacuum tank, and the optical lens, the optical glass group, the second photoelectric conversion device and the quantum chip are sequentially arranged below the first photoelectric conversion device. The utility model solves the problems that the superconducting quantum computer in the prior art is limited by the influence of the refrigeration power, and a large number of coaxial cables certainly influence the cooling efficiency and the lowest temperature of the whole machine refrigeration.

Description

Technical Field

[0001] The utility model relates to the technical field of quantum computers, in particular to a quantum space transmission channel based on quantum computers. Background Art

[0002] At present, superconducting quantum computers use coaxial cables and superconducting coaxial cables to transmit and measure quantum bits. When transmitting quantum bits, coaxial cable components need to convert, transmit and measure microwave pulses to achieve quantum computing. Each transmission channel is divided into three layers from top to bottom according to the temperature range. This microwave pulse passes through a channel composed of a large number of coaxial cables to realize the function of the quantum computer.

[0003] Superconducting quantum computers are limited by the cooling power, and a large number of coaxial cables will inevitably affect the cooling efficiency and minimum temperature of the entire machine. When the quantum bit requirement of a quantum computer is small, for example, the number of coaxial cable channels required for a 20-bit quantum computer is about 200, and when the quantum bit requirement is 100 bits, the number of coaxial cable channels required is about 400-500.

[0004] The added coaxial cable itself is mainly composed of metal materials. The specific heat capacity brought by this part of metal materials will greatly reduce the cooling speed of the refrigerator. At the same time, metal, as an excellent medium for heat conduction, also causes a decrease in cooling efficiency. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a quantum space transmission channel based on a quantum computer. The utility model solves the problem in the prior art that superconducting quantum computers are limited by the influence of refrigeration power, and a large number of coaxial cables are bound to affect the cooling efficiency and minimum temperature of the entire refrigeration machine.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] A quantum space transmission channel based on a quantum computer, comprising:

[0008] A pulse generator, a cryogenic vacuum tank, and a first photoelectric conversion device, an optical lens, a light-transmitting optical glass group, a second photoelectric conversion device, and a quantum chip arranged inside the cryogenic vacuum tank, wherein the light-transmitting optical glass group includes: a first light-transmitting optical glass, a second light-transmitting optical glass, a third light-transmitting optical glass, and a fourth light-transmitting optical glass;

[0009] The pulse generator is placed outside the cryogenic vacuum tank, the first photoelectric conversion device is arranged on the top of the cryogenic vacuum tank, and the optical lens, the optical glass group, the second photoelectric conversion device and the quantum chip are arranged below the first photoelectric converter in sequence;

[0010] The pulse generator is used to generate microwave pulses, the first photoelectric conversion device is used to convert the microwave pulses into optical signals, the optical lens is used to collimate the optical signals into parallel light beams, the second photoelectric conversion device is used to restore the parallel light beams into the microwave pulse signals, and the quantum chip is used to receive the restored microwave pulse signals.

[0011] Preferably, the first photoelectric converter and the second photoelectric converter are both beam collimating devices.

[0012] Preferably, the heat transfer coefficient of the optical lens is set to 50K.

[0013] Preferably, the first light-transmitting optical glass, the second light-transmitting optical glass, the third light-transmitting optical glass and the fourth light-transmitting optical glass are arranged in sequence according to the propagation direction of the parallel light beam.

[0014] Preferably, the heat transfer coefficient of the first light-transmitting optical glass is 4K.

[0015] Preferably, the heat transfer coefficient of the second light-transmitting optical glass is 1K.

[0016] Preferably, the heat transfer coefficient of the third light-transmitting optical glass is 100 mK.

[0017] Preferably, the heat transfer coefficient of the fourth light-transmitting optical glass is 10 mK

[0018] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0019] The utility model provides a quantum space transmission channel based on a quantum computer, the channel includes: a pulse generator, a low-temperature vacuum tank and a first photoelectric conversion device, an optical lens, a light-transmitting optical glass group, a second photoelectric conversion device, and a quantum chip arranged inside the low-temperature vacuum tank, wherein the light-transmitting optical glass group includes: a first light-transmitting optical glass, a second light-transmitting optical glass, a third light-transmitting optical glass, and a fourth light-transmitting optical glass; the pulse generator is placed outside the low-temperature vacuum tank, the first photoelectric conversion device is arranged on the top of the low-temperature vacuum tank, and the optical lens, the optical glass group, the second photoelectric conversion device, and the quantum chip are arranged below the first photoelectric converter in sequence; the pulse generator is used to generate microwave pulses, the first photoelectric conversion device is used to convert the microwave pulses into optical signals, the optical lens is used to collimate the optical signals into parallel beams, the second photoelectric conversion device is used to restore the parallel beams into the microwave pulse signals, and the quantum chip is used to receive the restored microwave pulse signals. The utility model transmits in the channel through optical signals, and there is no heat exchange caused by heat conduction, and there is no effect on cooling; the propagation speed is about 30% faster than the coaxial cable speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the structure of a quantum space transmission channel based on a quantum computer provided in an embodiment of the utility model.

[0022] Reference numerals:

[0023] 1-pulse generator, 2-low temperature vacuum tank, 3-first photoelectric conversion device, 4-optical lens, 5-second photoelectric conversion device, 6-quantum chip. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 As shown, the utility model provides a quantum space transmission channel based on a quantum computer, comprising:

[0028] A pulse generator 1, a cryogenic vacuum tank 2, a first photoelectric converter 3, an optical lens 4, a light-transmitting optical glass group, a second photoelectric converter 5, and a quantum chip 6 are arranged inside the cryogenic vacuum tank 2. The light-transmitting optical glass group includes: a first light-transmitting optical glass, a second light-transmitting optical glass, a third light-transmitting optical glass, and a fourth light-transmitting optical glass;

[0029] The pulse generator 1 is placed outside the cryogenic vacuum tank 2, the first photoelectric converter 3 is arranged on the top of the cryogenic vacuum tank 2, and the optical lens 4, the optical glass group, the second photoelectric converter 5 and the quantum chip 6 are arranged below the first photoelectric converter 3 in sequence;

[0030] The pulse generator 1 is used to generate microwave pulses, the first photoelectric converter 3 is used to convert the microwave pulses into optical signals, the optical lens 4 is used to collimate the optical signals into parallel beams, the second photoelectric converter 5 is used to restore the parallel beams into the microwave pulse signals, and the quantum chip 6 is used to receive the restored microwave pulse signals; the first photoelectric converter 3 and the second photoelectric converter 5 are both beam collimating devices; the heat transfer coefficient of the optical lens 4 is set to 50K; the first light-transmitting optical glass, the second light-transmitting optical glass, the third light-transmitting optical glass and the fourth light-transmitting optical glass are arranged in sequence according to the propagation direction of the parallel beam; the heat transfer coefficient of the first light-transmitting optical glass is 4K; the heat transfer coefficient of the second light-transmitting optical glass is 1K; the heat transfer coefficient of the third light-transmitting optical glass is 100mK; the heat transfer coefficient of the fourth light-transmitting optical glass is 10mK. Among them, 300k is the room temperature, and the power supply channel ensures the power required for the operation of the CPU chip of the quantum computer.

[0031] This embodiment also provides a quantum space transmission process based on a quantum computer, including:

[0032] Obtaining microwave pulses;

[0033] Converting the microwave pulse into an optical signal using a first photoelectric conversion device;

[0034] collimating the optical signal into a parallel light beam using an optical lens;

[0035] Remove the coaxial cable adapter at the preset position of the low-temperature vacuum tank and install a light-transmitting optical glass group at the preset position; the light-transmitting optical glass group includes: a first light-transmitting optical glass, a second light-transmitting optical glass, a third light-transmitting optical glass and a fourth light-transmitting optical glass;

[0036] Passing the parallel light beam through a light-transmitting optical glass group to reach the ultra-low temperature zone of a quantum computer transmission channel;

[0037] Using a second photoelectric conversion device to restore the parallel light beam into the microwave pulse signal;

[0038] The microwave pulse signal is transmitted to the quantum chip.

[0039] Specifically, the external control computer of the superconducting quantum computer first generates microwave pulses at room temperature outside the cryogenic tank, and then sets a photoelectric conversion device on the top of the tank to convert the microwave pulse signal into an optical signal, which is collimated into a parallel light beam through an optical lens. The position of the cryogenic vacuum tank originally used to install the coaxial cable adapter is replaced with light-transmitting optical glass, which allows the pulse parallel light beam to reach the ultra-low temperature zone where the quantum chip is located, and then the optical signal is converted and restored into a microwave pulse signal through the photoelectric conversion device and transmitted to the quantum chip.

[0040] Beneficial effects of the utility model:

[0041] (1) Light travels faster, about 30% faster than coaxial cable.

[0042] (2) Optical transmission does not require a medium and there is no heat conduction to cause heat exchange.

[0043] (3) Optical transmission channels can be wavelength-division multiplexed, and optical signals of different wavelengths can use the same beam channel, thereby increasing the density of transmission channels per unit space.

[0044] (4) The loss of optical transmission is much smaller than that of coaxial cable. The loss of coaxial cable is generally 2dB per meter, while the loss of optical transmission channel can reach 0.3dB per meter through calibration.

[0045] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0046] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. At the same time, for those skilled in the art, according to the ideas of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A quantum space transmission channel based on a quantum computer, characterized in that: include: A pulse generator, a cryogenic vacuum tank, and a first photoelectric conversion device, an optical lens, a light-transmitting optical glass group, a second photoelectric conversion device, and a quantum chip arranged inside the cryogenic vacuum tank, wherein the light-transmitting optical glass group includes: a first light-transmitting optical glass, a second light-transmitting optical glass, a third light-transmitting optical glass, and a fourth light-transmitting optical glass; The pulse generator is placed outside the cryogenic vacuum tank, the first photoelectric conversion device is arranged on the top of the cryogenic vacuum tank, and the optical lens, the optical glass group, the second photoelectric conversion device and the quantum chip are arranged below the first photoelectric converter in sequence; The pulse generator is used to generate microwave pulses, the first photoelectric conversion device is used to convert the microwave pulses into optical signals, the optical lens is used to collimate the optical signals into parallel light beams, the second photoelectric conversion device is used to restore the parallel light beams into the microwave pulse signals, and the quantum chip is used to receive the restored microwave pulse signals.

2. A quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The first photoelectric converter and the second photoelectric converter are both beam collimating devices.

3. A quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The heat transfer coefficient of the optical lens is set to 50K.

4. A quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The first light-transmitting optical glass, the second light-transmitting optical glass, the third light-transmitting optical glass and the fourth light-transmitting optical glass are arranged in sequence according to the propagation direction of the parallel light beam.

5. The quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The heat transfer coefficient of the first light-transmitting optical glass is 4K.

6. A quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The heat transfer coefficient of the second light-transmitting optical glass is 1K.

7. The quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The heat transfer coefficient of the third light-transmitting optical glass is 100 mK.

8. The quantum space transmission channel based on a quantum computer according to claim 1, characterized in that: The heat transfer coefficient of the fourth light-transmitting optical glass is 10 mK.

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