Adaptive homodyne measurement of optical phase

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dc.creatorArmen, Michael A.
dc.creatorAu, John K.
dc.creatorStockton, John K.
dc.creatorDoherty, Andrew C.
dc.creatorMabuchi, Hideo
dc.date2002-04-01
dc.date.accessioned2026-07-07T06:03:54Z
dc.date.available2026-07-07T06:03:54Z
dc.descriptionWe present an experimental demonstration of the power of real-time feedback in quantum metrology, confirming a theoretical prediction by Wiseman regarding the superior performance of an adaptive homodyne technique for single-shot measurement of optical phase. For phase measurements performed on weak coherent states with no prior knowledge of the signal phase, we show that the variance of adaptive homodyne estimation approaches closer to the fundamental quantum uncertainty limit than any previously demonstrated technique. Our results underscore the importance of real-time feedback for reaching quantum performance limits in coherent telecommunication, precision measurement and information processing.
dc.descriptionRevTex4, color PDF figures (separate files), submitted to PRL
dc.identifierhttps://arxiv.org/abs/quant-ph/0204005
dc.identifierhttp://arxiv.org/abs/quant-ph/0204005
dc.identifierPhys. Rev. Lett., 89, 133602 (2002)
dc.identifierdoi:10.1103/PhysRevLett.89.133602
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/90114
dc.subjectQuantum Physics
dc.titleAdaptive homodyne measurement of optical phase
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