Dynamics of a spin-boson model with structured spectral density |
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Authors: | Arzu Kurt Resul Eryigit |
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Institution: | Department of Physics, Abant Izzet Baysal University, Bolu, Turkey |
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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 is 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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Keywords: | Structured spectral density Spin-boson model Bath correlation functions |
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