Qubit decoherence by Gaussian low-frequency noise

K. Rabenstein; V. A. Sverdlov; D. V. Averin

doi:10.1134/1.1790024

Qubit decoherence by Gaussian low-frequency noise

K. Rabenstein
, V. A. Sverdlov
, D. V. Averin

Physics and Astronomy

Stony Brook University
St. Petersburg State University

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

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 τ determines the time t of crossover from the 1/t to the exponential suppression of coherence. We also performed Monte Carlo simulations of qubit dynamics with noise which agree with the analytical results.

Original language	English
Pages (from-to)	646-649
Number of pages	4
Journal	JETP Letters
Volume	79
Issue number	12
DOIs	https://doi.org/10.1134/1.1790024
State	Published - 2004

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title = "Qubit decoherence by Gaussian low-frequency noise",

abstract = "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 τ determines the time t of crossover from the 1/t to the exponential suppression of coherence. We also performed Monte Carlo simulations of qubit dynamics with noise which agree with the analytical results.",

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T1 - Qubit decoherence by Gaussian low-frequency noise

AU - Rabenstein, K.

AU - Sverdlov, V. A.

AU - Averin, D. V.

PY - 2004

Y1 - 2004

N2 - 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 τ determines the time t of crossover from the 1/t to the exponential suppression of coherence. We also performed Monte Carlo simulations of qubit dynamics with noise which agree with the analytical results.

AB - 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 τ determines the time t of crossover from the 1/t to the exponential suppression of coherence. We also performed Monte Carlo simulations of qubit dynamics with noise which agree with the analytical results.

UR - https://www.scopus.com/pages/publications/20444436832

U2 - 10.1134/1.1790024

DO - 10.1134/1.1790024

M3 - Article

AN - SCOPUS:20444436832

SN - 0021-3640

VL - 79

SP - 646

EP - 649

JO - JETP Letters

JF - JETP Letters

IS - 12

ER -

Qubit decoherence by Gaussian low-frequency noise

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