Quantum-field-theoretical techniques for stochastic representation of quantum problems

Details Quantum-field-theoretical techniques for stochastic representation of quantum problems Quantum-field-theoretical techniques for stochastic representation of quantum problems

2001-02-27

arxiv.org/abs/cond-mat/0102483v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We describe quantum-field-theoretical (QFT) techniques for mapping quantum problems onto c-number stochastic problems. This approach yields results which are identical to phase-space techniques [C.W. Gardiner, {\em Quantum Noise} (1991)] when the latter result in a Fokker-Planck equation for a corresponding pseudo-probability distribution. If phase-space techniques do not result in a Fokker-Planck equation and hence fail to produce a stochastic representation, the QFT techniques nevertheless yield stochastic difference equations in discretised time.

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