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International Journal of Quantum Information

PHASE CONJUGATE MIRRORS, ONE WAY VELOCITY OF LIGHT AND MEASURE OF ANTI-COHERENCE

Augusto Garuccio

Published Feb 1, 2007• 0 citations
Publisher

Abstract

The behavior of phase-conjugate mirrors (PCM) is discussed and a Michelson interferometer with a PCM is described and discussed. This interferometer has been proposed to be used to test the intrinsic non-locality of quantum mechanics and to measure the one-way velocity of light. Moreover, this device can be used in order to measure the intrinsic anticoherence of light.

DOI
10.1142/s0219749907002566

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The behavior of phase-conjugate mirrors (PCM) is discussed and a Michelson interferometer with a PCM is described and discussed. This interferometer has been proposed to be used to test the intrinsic non-locality of quantum mechanics and to measure the one-way velocity of light. Moreover, this device can be used in order to measure the intrinsic anticoherence of light.
The response of a phase-conjugate mirror (PCM) based on nondegenerate four-wave mixing to an incident photon wave packet has been calculated. In the monochromatic limit the phase-compensating property of the PCM, which makes the response independent of optical path length, is recovered. However, for a photon wave packet of nonzero bandwidth, the response of the PCM varies in a fairly complicated manner with the wave-packet length. In particular, the length of the pulse reflected from the PCM becomes independent of the length of the incident pulse for sufficiently short pulses.
Although the signal and idler light beams produced in the process of spontaneous parametric down-conversion are mutually incoherent and exhibit no one-photon interference, interference effects should be observable after either the signal or the idler is reflected by a phase-conjugate mirror. The degree of coherence can, in principle, be as large as unity. We refer to the relationship between the signal and the idler produced by down-conversion as anticoherent and introduce a natural measure for the degree of anticoherence. \textcopyright{} 1996 The American Physical Society.