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.
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Titolo: | Phase space Heisenberg-limited estimation of the average phase shift in a Mach-Zehnder interferometer |
Autori: | |
Data di pubblicazione: | 2020 |
Rivista: | |
Handle: | http://hdl.handle.net/11586/265028 |
Appare nelle tipologie: | 1.1 Articolo in rivista |