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Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer

A circuit structure, superconducting quantum technology, applied in the field of quantum computing, can solve problems such as qubit crosstalk, and achieve the effect of solving crosstalk between qubits and simple structure

Active Publication Date: 2019-11-19
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] Embodiments of the present invention provide a superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer to solve the problem of crosstalk between qubits

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  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
  • Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer

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Embodiment Construction

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

[0029] In order to solve the problem of crosstalk, the researchers proposed a superconducting circuit implementation scheme, such as figure 1 As shown, to realize a longitudinal field qubit-resonator coupling structure, the Hamiltonian form of its interaction is the qubit degree of freedom (such as its potential φ q or charge Q q ) is an even function of the resonator degree of freedom (such as its potential φ r or charge Q r ) odd function; on the basis of the Transmon qubit, two groups of components are coupled in parallel (each group includes parallel capacitance C, inductance L, and Josephson junctio...

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Abstract

The embodiment of the invention provides a superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and the superconducting circuit structure comprisesat least two basic units and a coupling structure, wherein the basic unit at least comprises a quantum bit and a resonant cavity coupled with the longitudinal field of the quantum bit, the resonant cavity comprises a first inductor and a first capacitor connected with the first inductor in parallel, and the resonant cavity and the quantum bit are subjected to longitudinal field coupling by utilizing the first inductor; and the coupling structure is used for coupling the resonant cavities in the two basic units so as to realize linear coupling between the two basic units. Thus, the problem ofcrosstalk among the quantum bits is solved, and the purposes of simple structure, easiness in regulation and control and expandability of the superconducting circuit are achieved on the basis of no crosstalk among the quantum bits.

Description

technical field [0001] The invention relates to the technical field of quantum computing, in particular to a superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer. Background technique [0002] Superconducting circuits, considered to be the most promising hardware candidates for quantum computing, are usually composed of multiple qubits combined in a certain coupling manner; when manipulating a qubit (usually by applying microwave pulses), Due to the interaction between qubits, another qubit will also be affected. This phenomenon is called crosstalk; this crosstalk phenomenon will directly affect the fidelity of single-bit or two-bit quantum logic gates. And then affect the performance of the superconducting quantum chip. Moreover, once the number of qubits gradually increases, the problem of crosstalk will become particularly prominent. Therefore, how to suppress crosstalk becomes an urgent problem to be solved. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/00
CPCG06N10/00
Inventor 晋力京段润尧
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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