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Correlations in noisy Landau-Zener transitions

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arxiv cond-mat/0312202 v1 pith:B6JGXNN4 submitted 2003-12-08 cond-mat.stat-mech physics.atm-clusquant-ph

Correlations in noisy Landau-Zener transitions

classification cond-mat.stat-mech physics.atm-clusquant-ph
keywords externallandau-zenernoiseresponsetransitionstwo-levelalthoughanalytic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We analyze the influence of classical Gaussian noise on Landau-Zener transitions during a two-level crossing in a time-dependent regular external field. Transition probabilities and coherence factors become random due to the noise. We calculate their two-time correlation functions, which describe the response of this two-level system to a weak external pulse signal. The spectrum and intensity of the magnetic response are derived. Although fluctuations are of the same order of magnitude as averages, the results is obtained in an analytic form.

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