Resonance Theory of Decoherence and Thermalization

Details Resonance Theory of Decoherence and Thermalization Resonance Theory of Decoherence and Thermalization

2007-02-22

arxiv.org/abs/quant-ph/0702207v1

Physics

Quantum Physics

Scientific paper

10.1016/j.aop.2007.04.013

We present a rigorous analysis of the phenomenon of decoherence for general $N-$level systems coupled to reservoirs. The latter are described by free massless bosonic fields. We apply our general results to the specific cases of the qubit and the quantum register. We compare our results with the explicitly solvable case of systems whose interaction with the environment does not allow for energy exchange (non-demolition, or energy conserving interactions). We suggest a new approach which applies to a wide variety of systems which are not explicitly solvable.

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