Recoil Free Scattering From a Free Gas

Details Recoil Free Scattering From a Free Gas Recoil Free Scattering From a Free Gas

2008-01-31

arxiv.org/abs/0801.4951v1

Physics

Atomic Physics

9 pages, 2 figures

Scientific paper

10.1103/PhysRevA.79.023610

We present a treatment of decoherence in an atom due to scattering from a gas of free particles. We show that there is a recoil free scattering process that leaves both the atom and the gas in an unchanged state, but allows for the acquisition of a phase shift that remains in the free space limit. This is essential to understanding decoherence in a separated arm atom interferometer, where a gas of atoms forms a refractive medium for a matter wave. Our work clarifies the extent to which scattering of a free particle acts as a which-way measurement.

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