Measuring quantum state overlaps of traveling optical fields

Details Measuring quantum state overlaps of traveling optical fields Measuring quantum state overlaps of traveling optical fields

1999-10-07

arxiv.org/abs/quant-ph/9910029v1

Physics

Quantum Physics

17 pages, 6 figures, using a4.sty

Scientific paper

10.1016/S0030-4018(99)00537-4

We propose a detection scheme for measuring the overlap of the quantum state of a weakly excited traveling-field mode with a desired reference quantum state, by successive mixing the signal mode with modes prepared in coherent states and performing photon-number measurements in an array of beam splitters. To illustrate the scheme, we discuss the measurement of the quantum phase and the detection of Schrodinger-cat-like states.

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