Model discrimination for dephasing two-level systems
نویسندگان
چکیده
منابع مشابه
Nonstationary dephasing of two level systems
– We investigate the influence of nonstationary 1/f 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 co...
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A. Zawadowski,1 Jan von Delft,2 and D. C. Ralph3 1Institute of Physics and Research Group of the Hungarian Academy of Sciences, Technical University of Budapest, H-1521 Budafoki út 8, Budapest, Hungary and Institute of Solid State Physics and Optics, H-1525 P.O. Box 49, Budapest, Hungary 2Institut für Theoretische Festkörperphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany 3Laboratory of ...
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The electron dephasing time tf in a diffusive quantum dot is calculated by considering the interaction between the electron and dynamical defects, modeled as two level systems. Using the standard tunneling model of glasses, we obtain a linear temperature dependence of 1/tf , consistent with the experimental observation. However, we find that, in order to obtain dephasing times on the order of n...
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 2015
ISSN: 0375-9601
DOI: 10.1016/j.physleta.2014.11.042