Two-qubit silicon quantum processor with operation fidelity exceeding 99%

被引：176
|
作者：
Mills, Adam R. [1 ]
Guinn, Charles R. [1 ]
Gullans, Michael J. [1 ,2 ]
Sigillito, Anthony J. [1 ,4 ]
Feldman, Mayer M. [1 ]
Nielsen, Erik [3 ]
Petta, Jason R. [1 ]
机构：
[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[2] Univ Maryland, Joint Ctr Quantum Informat & Comp Sci, NIST, College Pk, MD 20742 USA
[3] Sandia Natl Labs, Albuquerque, NM 87185 USA
[4] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA
来源：
SCIENCE ADVANCES | 2022年 / 8卷 / 14期
基金：
美国国家科学基金会;
关键词：
SINGLE-ELECTRON SPIN; THRESHOLD; CHARGE; LOGIC; NOISE; QUBIT; GATE;
D O I：
10.1126/sciadv.abn5130
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Silicon spin qubits satisfy the necessary criteria for quantum information processing. However, a demonstration of high-fidelity state preparation and readout combined with high-fidelity single- and two-qubit gates, all of which must be present for quantum error correction, has been lacking. We use a two-qubit Si/SiGe quantum processor to demonstrate state preparation and readout with fidelity greater than 97%, combined with both singleand two-qubit control fidelities exceeding 99%. The operation of the quantum processor is quantitatively characterized using gate set tomography and randomized benchmarking. Our results highlight the potential of silicon spin qubits to become a dominant technology in the development of intermediate-scale quantum processors.
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页数：5
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