Nonlinear Interferometry via Fock State Projection

Details Nonlinear Interferometry via Fock State Projection Nonlinear Interferometry via Fock State Projection

2006-01-16

arxiv.org/abs/quant-ph/0601104v2

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.96.203601

We use a photon-number resolving detector to monitor the photon number distribution of the output of an interferometer, as a function of phase delay. As inputs we use coherent states with mean photon number up to seven. The postselection of a specific Fock (photon-number) state effectively induces high-order optical non-linearities. Following a scheme by Bentley and Boyd [S.J. Bentley and R.W. Boyd, Optics Express 12, 5735 (2004)] we explore this effect to demonstrate interference patterns a factor of five smaller than the Rayleigh limit.

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