Optical interferometry in the presence of large phase diffusion

Details Optical interferometry in the presence of large phase diffusion Optical interferometry in the presence of large phase diffusion

2012-03-13

arxiv.org/abs/1203.2956v1

Phys. Rev. A 85, 043817 (2012)

Physics

Quantum Physics

Scientific paper

Phase diffusion represents a crucial obstacle towards the implementation of high precision interferometric measurements and phase shift based communication channels. Here we present a nearly optimal interferometric scheme based on homodyne detection and coherent signals for the detection of a phase shift in the presence of large phase diffusion. In our scheme the ultimate bound to interferometric sensitivity is achieved already for a small number of measurements, of the order of hundreds, without using nonclassical light.

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