Direct and indirect strategies for phase measurement

Details Direct and indirect strategies for phase measurement Direct and indirect strategies for phase measurement

1997-12-16

arxiv.org/abs/quant-ph/9712032v1

Physics

Quantum Physics

RevTeX + 3 postscript figures, 11 pages, submitted to Physical Review A

Scientific paper

Recently, Torgerson and Mandel [Phys. Rev. Lett. 76, 3939 (1996)] have reported a disagreement between two schemes for measuring the phase difference of a pair of optical fields. We analyze these schemes and derive their associated phase-difference probability distributions, including both their strong and weak field limits. Our calculation confirms the main point of Torgerson and Mandel of the non-uniqueness of an operational definition of the phase distribution. We further discuss the role of postselection of data and argue that it cannot meaningfully improve the sensitivity.

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