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Article Dans Une Revue EPL - Europhysics Letters Année : 2004

Nonstationary dephasing of two-level systems

Résumé

We investigate the influence of nonstationary 1/fμ noise, produced by interacting defects, on a quantum two-level system. Adopting a simple phenomenological model for this noise we describe exactly the corresponding dephasing in various regimes. The nonstationarity and pronounced non-Gaussian features of this noise induce new anomalous dephasing scenarii. Beyond a history-dependent critical coupling strength, the dephasing time exhibits a strong dependence on the age of the noise and the decay of coherence is not exponential.

Dates et versions

hal-00641677 , version 1 (16-11-2011)

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Josef Schriefl, Maxime Clusel, David Carpentier, Pascal Degiovanni. Nonstationary dephasing of two-level systems. EPL - Europhysics Letters, 2004, 69, pp.156. ⟨10.1209/epl/i2004-10324-1⟩. ⟨hal-00641677⟩
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