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European Quantum Electronics Conference (EQEC)

Ultimate Quantum Limits In The Measurement Of Very Small Displacements in Optical Images

Claude Fabre, Agnès Maître, Matthias Vaupel

Published Aug 24, 2005• 0 citations
Publisher
DOI
10.1109/eqec.1998.715166

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We consider the problem of the measurement of very small displacements in the transverse plane of an optical image with a split photodetector. We show that the standard quantum limit for such a measurement, which is equal to the diffraction limit divided by the square root of the number of photons used in the measurement, cannot be overcome by use of ordinary single-mode squeezed light. We give the form of possible multimode nonclassical states of light, enabling us to enhance by orders of magnitude the resolution of such a measurement beyond the standard quantum limit.