2022
DOI: 10.1103/physrevlett.128.040504
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Multiple-Phase Quantum Interferometry: Real and Apparent Gains of Measuring All the Phases Simultaneously

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Cited by 22 publications
(24 citation statements)
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“…The nontrivial question is, if the sum of variances for the optimal joint measurement will follow a similar scaling-it may turn out that the existence of the advantage depends on paradigm chosen. As recently shown in [61], for the multiphases estimation problem in a multiarm interferometer, this issue does not lead to divergent conclusions-even if the scaling of the total cost with the number of the parameters depends on the paradigm, the potential advantage obtainable by measuring all of the parameters jointly instead of separately is very similar in both paradigms. In this paper we analyze this issue more generally and show that result is not universal-it may happen that existence or absence of the advantage indeed depends on the paradigm chosen.…”
Section: Introductionmentioning
confidence: 87%
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“…The nontrivial question is, if the sum of variances for the optimal joint measurement will follow a similar scaling-it may turn out that the existence of the advantage depends on paradigm chosen. As recently shown in [61], for the multiphases estimation problem in a multiarm interferometer, this issue does not lead to divergent conclusions-even if the scaling of the total cost with the number of the parameters depends on the paradigm, the potential advantage obtainable by measuring all of the parameters jointly instead of separately is very similar in both paradigms. In this paper we analyze this issue more generally and show that result is not universal-it may happen that existence or absence of the advantage indeed depends on the paradigm chosen.…”
Section: Introductionmentioning
confidence: 87%
“…C for more details and discussion about applicability of this approach to a many parameter problem. See also [32,61,71] for further discussion about optimization of region discrimination in the first part of the above construction, as well as a general discussion about this bound for finite N .…”
Section: A Single Parameter Staurable Lower Boundmentioning
confidence: 99%
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