9-13 July 2012
Africa/Johannesburg timezone
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The role of the initial system-bath correlations in the dynamics of open quantum systems

Presented by Dr. Vitalii SEMIN on 11 Jul 2012 from 16:50 to 17:10
Type: Oral Presentation
Session: Theoretical
Track: Track G - Theoretical and Computational Physics

Abstract

In the typical derivation of the master equation for the system - bath interaction it is assumed that initially system and bath are uncorrelated. However, in many physical situations it is not the case. Here, we study the influence of the initial system-bath correlations on the dynamics of the system. As a toy model we will consider a particle with spin 1/2 interacting with a spin bath through an intermediate spin. On the one hand, we use the technique of correlated projection operators to construct a time convolutionless (TCL) master equation with inhomogenous term and on the other hand we will solve exactly the equation for the evolution operator of the total system. This allow us not only to study the influence of the initial correlation on the system bath dynamics, but also the influence of the initial system-bath correlations on the accuracy of TCL approach.

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Primary authors

  • Dr. Vitalii SEMIN Quantum Research Group, School of Chemistry and Physics, University of Kwazulu-Natal
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