RT Journal Article
T1 Optimum phase-shift estimation and the quantum description of the phase difference
A1 Luis Aina, Alfredo
A1 Peřina, J.
AB The problem of a correct quantum description of the phase difference is examined from the perspective of parameter estimation theory. It is shown that an optimum phase-shift measurement defines a phase difference operator which coincides with other approaches to the same problem. We also study the fundamental limit to the accuracy of a phase difference shift detection. We show that this limit can be reached by a measurement having countable outcomes despite the fact that a phase shift can take any value. We show that this is the case of the phase difference operator defined by an optimum phase-shift measurement.
PB American Physical Society
SN 1050-2947
YR 1996
FD 1996-11
LK https://hdl.handle.net/20.500.14352/59726
UL https://hdl.handle.net/20.500.14352/59726
LA eng
NO © 1996 The American Physical Society. A.L. acknowledges the support of a grant from the Dirección General de Investigación Científica y Técnica del Ministerio Español de Educación y Ciencia and the kind hospitality from the Optics Department of the Palacký University.
NO Ministerio de Educación y Ciencia (MEC), España
NO Dirección General de Investigación Científica y Técnica (DGICYT), España
DS Docta Complutense
RD 11 abr 2025