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Superconducting circuit architecture comprising plurality of coupling devices and superconducting quantum chip

A coupling device and superconducting quantum interference technology, applied in the field of superconducting quantum chips and superconducting quantum computers, can solve problems such as limiting the performance of quantum chips and affecting the fidelity of quantum gates, so as to eliminate parasitic coupling, improve performance, and improve Fidelity effect

Active Publication Date: 2020-08-11
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, there are many types of couplings that couple qubits together, often in addition to the designed coupling between qubits, there may be some unavoidable parasitic couplings; these parasitic couplings will seriously affect the protection of quantum gates. True degree, which will limit the performance of the entire quantum chip

Method used

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  • Superconducting circuit architecture comprising plurality of coupling devices and superconducting quantum chip
  • Superconducting circuit architecture comprising plurality of coupling devices and superconducting quantum chip
  • Superconducting circuit architecture comprising plurality of coupling devices and superconducting quantum chip

Examples

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no. 1 example

[0020] see figure 1 , figure 1 is a schematic diagram of the structure of a superconducting circuit including multiple coupling devices according to the first embodiment of the present application, such as figure 1 As shown, the superconducting circuit architecture 100 including multiple coupling devices includes: a first qubit 101 and a second qubit 102, and a first coupling device 103 and a second coupling device 104;

[0021] The first coupling device 103 is respectively coupled to the first qubit 101 and the second qubit 102 through a first connecting member 105;

[0022] The second coupling device 104 is respectively coupled to the first qubit 101 and the second qubit 102 through a second connecting member 106;

[0023] Wherein, the frequency of the first qubit 101 and the second qubit 102 is between the frequency of the first coupling device 103 and the frequency of the second coupling device 104, and the frequency of the first coupling device 103 The non-linear stren...

no. 2 example

[0105] The present application provides a superconducting quantum chip. The superconducting quantum chip includes the superconducting circuit architecture including a plurality of coupling devices in the first embodiment. The superconducting circuit architecture includes: a first qubit and a second qubit bit, and a first coupling device and a second coupling device;

[0106] The first coupling device is respectively coupled to the first qubit and the second qubit through a first connection;

[0107] The second coupling device is respectively coupled to the first qubit and the second qubit through second connectors;

[0108] Wherein, the frequency of the first qubit and the second qubit is between the frequency of the first coupling device and the frequency of the second coupling device, and the nonlinear strength of the first coupling device is related to the The sign of the nonlinear strength of the second coupling device is opposite.

[0109] Optionally, both the first cou...

no. 3 example

[0126] The present application provides a superconducting quantum computer, which includes a superconducting quantum chip, and may also include a control and reading device connected to the superconducting quantum chip. Wherein, the superconducting quantum chip includes the superconducting circuit architecture including multiple coupling devices in the first embodiment, and the superconducting circuit architecture includes: the first qubit and the second qubit, and the first coupling device and the second qubit. coupling device;

[0127] The first coupling device is respectively coupled to the first qubit and the second qubit through a first connection;

[0128] The second coupling device is respectively coupled to the first qubit and the second qubit through second connectors;

[0129] Wherein, the frequency of the first qubit and the second qubit is between the frequency of the first coupling device and the frequency of the second coupling device, and the nonlinear strength...

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Abstract

The invention discloses a superconducting circuit architecture comprising a plurality of coupling devices, a superconducting quantum chip and a superconducting quantum computer, and relates to the technical field of quantum computing. The circuit comprises a first quantum bit, a second quantum bit, a first coupling device and a second coupling device, the first coupling device is coupled with thefirst quantum bit and the second quantum bit through a first connecting piece; the second coupling device is coupled with the first quantum bit and the second quantum bit through a second connecting piece; and the frequencies of the first quantum bit and the second quantum bit are between the frequency of the first coupling device and the frequency of the second coupling device, and the nonlinearstrength of the first coupling device is opposite to the nonlinear strength of the second coupling device in sign. According to the technical scheme of the invention, parasitic coupling between quantum bits in the superconducting circuit can be eliminated, and the fidelity of a single-bit quantum gate and a two-bit quantum gate realized in the superconducting circuit is improved.

Description

technical field [0001] The present application relates to the field of computers, in particular to the field of quantum computing technology, and in particular to a superconducting circuit architecture including multiple coupling devices, a superconducting quantum chip and a superconducting quantum computer. Background technique [0002] In superconducting circuits, qubits are coupled together in a specific way, and by applying microwave pulses to the qubits, single-bit or two-bit quantum gates can be realized. [0003] Usually, there are many types of couplings that couple qubits together, often in addition to the designed coupling between qubits, there may be some unavoidable parasitic couplings; these parasitic couplings will seriously affect the protection of quantum gates. True degree, which will limit the performance of the entire quantum chip. Contents of the invention [0004] The present application provides a superconducting circuit architecture including multip...

Claims

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Application Information

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IPC IPC(8): G06N10/00
CPCG06N10/00G06N10/40H10N60/12
Inventor 晋力京段润尧
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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