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

朱行宇 ¹朱乐天 ²涂涛 ³李传锋³

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作者信息

1. 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
2. Key Laboratory of Quantum Information,Chinese Academy of Sciences,University of Science and Technology of China,Hefei 230026,China
3. Key Laboratory of Quantum Information,Chinese Academy of Sciences,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Chinese Academy of Sciences,Hefei 230088,China
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Abstract

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.

Key words

hybrid quantum architectures/circuit quantum electrodynamics/entangling gate

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基金项目

National Natural science Foundation of China(11974336)

National Natural science Foundation of China(12304401)

National Key R&D Program of China(2017YFA0304100)

Key Project of Natural science Research in Universities of Anhui Province(KJ2021A1107)

Scientific Research Foundation of Suzhou University(2020BS006)

Scientific Research Foundation of Suzhou University(2021XJPT18)

出版年

2024

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

参考文献量40

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