Dynamics of a spin-boson model with structured spectral density

2016/12/31 by Arzu Kurt, Arzu, Kurt, Resul Eryiğit +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies

paper · pdf · doi:10.48550/arxiv.1701.00122

openalex publication_date 2016/12/31 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

Abstract

We report the results of a study of the dynamics of a two-state system coupled to an environment with peaked spectral density. An exact analytical expression for the bath correlation function is obtained. Validity range of various approximations to the correlation function for calculating the population difference of the system are discussed as function of tunneling splitting, oscillator frequency, coupling constant, damping rate and the temperature of the bath. An exact expression for the population difference for a limited range of parameters, is derived.

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