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Open Quantum Systems: Density Matrix Formalism and Applications

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2012

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Springer
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Tempel, David G., Joel Yuen-Zhou, and Alan Apuru-Guzik. 2012. Open quantum systems: density matrix formalism and applications. Fundamentals of Time-Dependent Density Functional Theory. Lecture Notes in Physics 837:211-229.

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Abstract

In its original formulation, TDDFT addresses the isolated dynamics of electronic systems evolving unitarily (Runge and Gross 1984). However, there exist many situations in which the electronic degrees of freedom are not isolated, but must be treated as a subsystem imbedded in a much larger thermal bath.

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Open Quantum Systems: Density Matrix Formalism… : DASH Story 2013-03-03
As a student I came across this article while I was searching for a mathematical structure for defining the evolution of density matrices in open quantum systems ,and open access was indeed helpful in many ways.