Quantum phase measurements with infinite peak-likelihood and zero phase information
- 1 February 1992
- journal article
- Published by IOP Publishing in Quantum Optics: Journal of the European Optical Society Part B
- Vol. 4 (1) , 31-37
- https://doi.org/10.1088/0954-8998/4/1/004
Abstract
Maximum likelihood estimation of an unknown c-number phaseshift is considered, along the lines established by Shapiro, Shepard and Wong, Phys. Rev. Lett., vol.62, p.2377, 1989. An input state is exhibited whose reciprocal peak likelihood vanishes, delta phi to 0, while its phase-measurement probability density converges, in distribution, to uniform, p( phi mod Phi ) to d1/2 pi .Keywords
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