首页|Remote entangling gate between a quantum dot spin and a transmon qubit mediated by microwave photons

Remote entangling gate between a quantum dot spin and a transmon qubit mediated by microwave photons

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Spin qubits and superconducting qubits are promising candidates for realizing solid-state quantum information pro-cessors.Designing a hybrid architecture that combines the advantages of different qubits on the same chip is a highly desirable but challenging goal.Here we propose a hybrid architecture that utilizes a high-impedance SQUID array res-onator as a quantum bus,thereby coherently coupling different solid-state qubits.We employ a resonant exchange spin qubit hosted in a triple quantum dot and a superconducting transmon qubit.Since this hybrid system is highly tunable,it can operate in a dispersive regime,where the interaction between the different qubits is mediated by virtual photons.By utilizing such interactions,entangling gate operations between different qubits can be realized in a short time of 30 ns with a fidelity of up to 96.5％under realistic parameter conditions.Further utilizing this interaction,remote entangled state between different qubits can be prepared and is robust to perturbations of various parameters.These results pave the way for exploring efficient fault-tolerant quantum computation on hybrid quantum architecture platforms.

hybrid quantum architecturescircuit quantum electrodynamicsentangling gate

朱行宇、朱乐天、涂涛、李传锋

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Key Laboratory of Quantum Information,Chinese Academy of Sciences,University of Science and Technology of China,Hefei 230026,China

School of Mechanical and Electronic Engineering,Suzhou University,Suzhou 234000,China

Hefei National Laboratory,University of Science and Technology of China,Chinese Academy of Sciences,Hefei 230088,China

National Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Key R&D Program of ChinaKey Project of Natural science Research in Universities of Anhui ProvinceScientific Research Foundation of Suzhou UniversityScientific Research Foundation of Suzhou University

11974336123044012017YFA0304100KJ2021A11072020BS0062021XJPT18

2024

10.1088/1674-1056/ad1747

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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