Decoherence of two coupled singlet-triplet spin qubits

被引：9
|
作者：
Wu, Yang-Le [1 ]
Das Sarma, S.
机构：
[1] Univ Maryland, Condensed Matter Theory Ctr, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW B | 2017年 / 96卷 / 16期
关键词：
QUANTUM COMPUTATION; GATE; FIDELITY;
D O I：
10.1103/PhysRevB.96.165301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study a pair of capacitively coupled singlet-triplet spin qubits. We characterize the two-qubit decoherence through two complementary measures, the decay time of coupled-qubit oscillations and the fidelity of entangled state preparation. We provide a quantitative map of their dependence on charge noise and field noise, and we highlight the magnetic field gradient across each singlet-triplet qubit as an effective tool to suppress decoherence due to charge noise.
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收藏
页数：7
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