High-Fidelity Single-Qubit Gates for Two-Electron Spin Qubits in GaAs

被引：48

作者：

Cerfontaine, Pascal ^{[1
]}

Botzem, Tim ^{[1
]}

DiVincenzo, David P. ^{[1
,2
]}

Bluhm, Hendrik ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, JARA Inst Quantum Informat, D-52074 Aachen, Germany

[2] Res Ctr Julich, Peter Grunberg Inst Theoret Nanoelect, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 15期

关键词：

III-V semiconductors - Quantum computers - Magnetic moments - Quantum optics - Semiconducting gallium - Logic gates - Semiconductor quantum dots - Systematic errors - Electrospinning;

D O I：

10.1103/PhysRevLett.113.150501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single-qubit operations on singlet-triplet qubits in GaAs double quantum dots have not yet reached the fidelities required for fault-tolerant quantum information processing. Considering experimentally important constraints and using measured noise spectra, we numerically minimize the effect of decoherence (including high-frequency 1/f-like noise) and show, theoretically, that quantum gates with fidelities higher than 99.9% are achievable. We also present a self-consistent tuning protocol which should allow the elimination of individual systematic gate errors directly in an experiment.

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页数：5

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