Decoherence of a particle across a medium: a microscopic derivation

Details Decoherence of a particle across a medium: a microscopic derivation Decoherence of a particle across a medium: a microscopic derivation

2003-03-11

arxiv.org/abs/quant-ph/0303066v1

Physics

Quantum Physics

24 pages, 2 figures

Scientific paper

We deduce from a microscopic point of view the equation that describes how the state of a particle crossing a medium decoheres. We apply our results to the example of a particle crossing a gas, computing explicitly the Lindblad operators in terms of the interaction potential between the particle and a target of the medium. We interpret the imaginary part of the refraction index as a loss of quantum coherence, that is reflected in the disappearance of interference patterns in a Young experiment.

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