Decoherence induced by Smith-Purcell radiation

Details Decoherence induced by Smith-Purcell radiation Decoherence induced by Smith-Purcell radiation

2007-10-11

arxiv.org/abs/0710.2289v2

Physics

Quantum Physics

10 pages, 3 figures. Improved discussion on experimental perspectives. References added. Version to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.77.032113

The interaction between charged particles and the vacuum fluctuations of the electromagnetic field induces decoherence, and therefore affects the contrast of fringes in an interference experiment. In this article we show that if a double slit experiment is performed near a conducting grating, the fringe visibility is reduced. We find that the reduction of contrast is proportional to the number of grooves in the conducting surface, and that for realistic values of the parameters it could be large enough to be observed. The effect can be understood in terms of the Smith-Purcell radiation produced by the surface currents induced in the conductor.

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