High-Fidelity State Preparation, Quantum Control, and Readout of an Isotopically Enriched Silicon Spin Qubit

被引：26

作者：

Mills, A. R. ^{[1
]}

Guinn, C. R. ^{[1
]}

Feldman, M. M. ^{[1
]}

Sigillito, A. J. ^{[1
,6
]}

Gullans, M. J. ^{[2
]}

Rakher, M. T. ^{[3
]}

Kerckhoff, J. ^{[3
]}

Jackson, C. A. C. ^{[3
]}

Petta, J. R. ^{[1
,3
,4
,5
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Univ Maryland, NIST, Joint Ctr Quantum Informat & Comp Sci, College Pk, MD 20742 USA

[3] HRL Labs LLC, 3011 Malibu Canyon Rd, Malibu, CA 90265 USA

[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[5] Univ Calif Los Angeles, Ctr Quantum Sci & Engn, Los Angeles, CA 90095 USA

[6] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW APPLIED | 2022年 / 18卷 / 06期

基金：

美国国家科学基金会;

关键词：

SINGLE-ELECTRON SPIN; THRESHOLD;

D O I：

10.1103/PhysRevApplied.18.064028

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Quantum systems must be prepared, controlled, and measured with high fidelity in order to perform complex quantum algorithms. Control fidelities have greatly improved in silicon spin qubits but state -preparation and readout fidelities have generally been poor. By operating with low electron temperatures and employing high-bandwidth cryogenic amplifiers, we demonstrate single-qubit readout visibilities > 99%, exceeding the threshold for quantum error correction. In the same device, we achieve average single-qubit control fidelities > 99.95%. Our results show that silicon spin qubits can be operated with high overall operation fidelity.

引用

页数：8

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