Quantum stochastic equation for the low density limit

Details Quantum stochastic equation for the low density limit Quantum stochastic equation for the low density limit

2001-08-24

arxiv.org/abs/quant-ph/0108112v2

J. Phys. A: Math. Gen. 35 (2002) 4889-4902

Physics

Quantum Physics

Replaced with version published in J. Phys. A. References are added

Scientific paper

10.1088/0305-4470/35/23/306

A new derivation of quantum stochastic differential equation for the evolution operator in the low density limit is presented. We use the distribution approach and derive a new algebra for quadratic master fields in the low density limit by using the energy representation. We formulate the stochastic golden rule in the low density limit case for a system coupling with Bose field via quadratic interaction. In particular the vacuum expectation value of the evolution operator is computed and its exponential decay is shown.

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