Completely Positive Quantum Dissipation

Details Completely Positive Quantum Dissipation Completely Positive Quantum Dissipation

2000-02-29

arxiv.org/abs/quant-ph/0002094v1

Phys. Rev. Lett. 84 (2000) 1374-1377

Physics

Quantum Physics

8 pages, revtex, no figures

Scientific paper

10.1103/PhysRevLett.84.1374

A completely positive master equation describing quantum dissipation for a Brownian particle is derived starting from microphysical collisions, exploiting a recently introduced approach to subdynamics of a macrosystem. The obtained equation can be cast into Lindblad form with a single generator for each Cartesian direction. Temperature dependent friction and diffusion coefficients for both position and momentum are expressed in terms of the collision cross-section.

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