Nonextensive approach to decoherence in quantum mechanics

Details Nonextensive approach to decoherence in quantum mechanics Nonextensive approach to decoherence in quantum mechanics

2000-02-24

arxiv.org/abs/quant-ph/0002071v2

Physics

Quantum Physics

4 pages, RevTeX, 1 figure We have corrected a problem with the figures' file as well as a few misprints

Scientific paper

10.1016/S0375-9601(00)00820-3

We propose a nonextensive generalization (q parametrized) of the von Neumann equation for the density operator. Our model naturally leads to the phenomenon of decoherence, and unitary evolution is recovered in the limit of q -> 1. The resulting evolution yields a nonexponential decay for quantum coherences, fact that might be attributed to nonextensivity. We discuss, as an example, the loss of coherence observed in trapped ions.

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