Ultimate quantum limits on phase measurement.
作者： Jeffrey H. Shapiro , Scott R. Shepard , Ngai C. Wong
DOI: 10.1103/PHYSREVLETT.62.2377
关键词:
摘要: The Susskind-Glogower (SG) phase operator is shown to be the maximum-likelihood (ML) quantum measurement of optical for all input states. ML performance SG optimized, at average photon number N, by an state with number-ket representation form ${\mathrm{\ensuremath{\psi}}}_{\mathrm{n}}$=A/(1+n), 0\ensuremath{\le}n\ensuremath{\le}Ml\ensuremath{\infty}. optimum phase-error behavior, measured reciprocal peak-likelihood, proportional 1/${\mathrm{N}}^{2}$, as opposed 1/ \ensuremath{\surd}N and 1/N dependences coherent-state squeezed-state interferometers.
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