Qubit decoherence by Gaussian low-frequency noise

被引：21

作者：

Rabenstein, K ^{[1
]}

Sverdlov, VA

Averin, DV

机构：

[1] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[2] St Petersburg State Univ, VA Fock Inst Phys, St Petersburg 198904, Russia

来源：

JETP LETTERS | 2004年 / 79卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1134/1.1790024

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have derived an explicit nonperturbative expression for decoherence of quantum oscillations in a qubit by Gaussian low-frequency noise. Decoherence strength is controlled by the noise spectral density at zero frequency, while the noise correlation time tau determines the time t of crossover from the 1/roott to the exponential suppression of coherence. We also performed Monte Carlo simulations of qubit dynamics with noise which agree with the analytical results. (C) 2004 MAIK "Nauka / Interperiodica".

引用

页码：646 / 649

页数：4

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