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paper

Phase shift of a weak coherent beam induced by a single atom

arXiv:0905.3734 · doi:10.1103/PhysRevLett.103.153601

Abstract

We report on a direct measurement of a phase shift on a weak coherent beam by a single Rb-87 atom in a Mach-Zehnder interferometer. A maximum phase shift of about 1 degree is observed experimentally.

4 pages, 3 figures