Phase space Heisenberg-limited estimation of the average phase shift in a Mach–Zehnder interferometer
2020 ◽
Vol 18
(01)
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pp. 1941019
Keyword(s):
We address the problem of distributed quantum metrology with a single squeezed-vacuum source by using the formalism of quantum mechanics in phase space. In particular, we demonstrate Heisenberg-limited sensitivity in the measurement of the average of two arbitrary phase shifts in the arms of a Mach–Zehnder interferometer. We obtain exact results for the measurement probability at the interferometer output for any value of the phases, which give us insight into the emergence of Heisenberg-limited sensitivity for periodical values of the phases.
2005 ◽
Vol 72
(4)
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pp. 290-296
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Keyword(s):
1991 ◽
Vol 8
(3)
◽
pp. 681
◽
Keyword(s):
Keyword(s):