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Tunable qubit coupler

A qubit and coupler technology, applied in quantum computers, instruments, superconducting devices, etc., can solve problems such as programming and maintenance hindering the realization of large-scale quantum computing

Pending Publication Date: 2021-03-05
GOOGLE LLC
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The multiple challenges of controlling, programming, and maintaining quantum hardware in the design and implementation of quantum architectures hinder the realization of large-scale quantum computing

Method used

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Embodiment Construction

[0023] overview

[0024] Controlling the interactions between qubits is important to enable quantum simulation and universal quantum computing. For example, to execute an algorithm on a quantum computer, one or more two-qubit gates may need to be applied. Two-qubit gates can be implemented by having two qubits interact. In some implementations, tunable qubit couplers can be used to dynamically control the interaction between qubits.

[0025] When using superconducting qubits (such as transmon qubits), the coupling between the first and second qubits can be achieved by placing the edge of the first qubit close to the edge of the second qubit. However, this design only allows dynamic control of the coupling between qubits by detuning the resonance frequency of at least one of the two qubits. This requires a high degree of control, since detuning often causes the qubit to excite to states outside the computational subspace. Furthermore, since a sufficiently large detuning i...

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Abstract

Methods, systems and apparatus for implementing a tunable qubit coupler. In one aspect, a device includes: a first data qubit, a second data qubit, and a third qubit that is a tunable qubit coupler arranged to couple to the first data qubit and to couple to the second data qubit such that, during operation of the device, the tunable qubit coupler allows tunable coupling between the first data qubit and the second data qubit.

Description

technical field [0001] The present disclosure relates to tunable qubit couplers. Background technique [0002] Large-scale quantum computers have the potential to provide fast solutions to certain classes of different difficult problems. The multiple challenges of controlling, programming, and maintaining quantum hardware in the design and implementation of quantum architectures hinder the realization of large-scale quantum computing. Contents of the invention [0003] This disclosure describes techniques for implementing tunable qubit couplers. [0004] In general, innovative aspects of the presently disclosed subject matter can be embodied in an apparatus comprising: a first data qubit; a second data qubit; and a third qubit, wherein the third qubit is a tunable qubit a coupler arranged to be coupled to the first data qubit and to the second data qubit such that during operation of the device the tunable qubit coupler allows tunable coupling. [0005] Implementations...

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Application Information

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IPC IPC(8): G06N10/00
CPCG06N10/40B82Y10/00G06N10/00H10N60/805H10N60/12
Inventor C.尼尔A.E.梅格伦特
Owner GOOGLE LLC
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