Nonstationary dephasing of two-level systems
| Autor: | David Carpentier, Maxime Clusel, Josef Schriefl, Pascal Degiovanni |
|---|---|
| Přispěvatelé: | Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institüt für Theoretische Festkörperphysik (ITFK), Universität Karlsruhe (TH), Institut fur Theoretische Festkorperphysik (ITF), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Coupling strength 1/f noise Dephasing General Physics and Astronomy FOS: Physical sciences intermittent noise 01 natural sciences 010305 fluids & plasmas Exponential function 0103 physical sciences Phenomenological model Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ddc:530 Statistical physics [PHYS.COND.CM-SM]Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech] 010306 general physics Quantum [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] Coherence (physics) |
| Zdroj: | EPL-Europhysics Letters EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2004, 69, pp.156. ⟨10.1209/epl/i2004-10324-1⟩ EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2005, 69, pp.156 EPL-Europhysics Letters, 2005, 69, pp.156 Europhysics Letters, 69 (2), 156-162 EPL-Europhysics Letters, 2004, 69, pp.156. ⟨10.1209/epl/i2004-10324-1⟩ |
| ISSN: | 0295-5075 1286-4854 |
| DOI: | 10.1209/epl/i2004-10324-1⟩ |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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