Master Equation for Electromagnetic Dissipation and Decoherence of Density Matrix

Details Master Equation for Electromagnetic Dissipation and Decoherence of Density Matrix Master Equation for Electromagnetic Dissipation and Decoherence of Density Matrix

2000-11-29

arxiv.org/abs/cond-mat/0011486v1

Eur. Phys. J. B, 21 (2001) 553

Physics

Condensed Matter

Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of paper (including all P

Scientific paper

10.1007/s100510170166

We set up a forward--backward path integral for a point particle in a bath of photons to derive a master equation for the density matrix which describes electromagnetic dissipation and decoherence. As an application, we recalculate the Weisskopf-Wigner formula for the natural line width of an atomic state at zero temperature and find, in addition, the temperature broadening caused by the decoherence term.

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