Phase diffusion represents a crucial obstacle toward 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.

Optical interferometry in the presence of large phase diffusion / M. Genoni, S. Olivares, D. Brivio, S. Cialdi, D.E. Cipriani, A. Santamato, S. Vezzoli, M. Paris. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 85:4(2012 Apr 10), pp. 043817.043817.1-043817.043817.5.

Optical interferometry in the presence of large phase diffusion

M. Genoni;S. Olivares;S. Cialdi;D.E. Cipriani;S. Vezzoli;M. Paris
2012-04-10

Abstract

Phase diffusion represents a crucial obstacle toward 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.
standard quantum limit; enhanced measurements
Settore FIS/03 - Fisica della Materia
PHYSICAL REVIEW A
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/175618
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