Related papers: Measurement compatibility in multiparameter quantum interferometry

Measurement compatibility in multiparameter quantum interferometry

URL: http://arxiv.org/abs/2504.18324v1
Date: Fri, 25 Apr 2025 13:04:13 GMT
Title: Measurement compatibility in multiparameter quantum interferometry
Authors: Jayanth Jayakumar, Marco Barbieri, Magdalena Stobińska,
Abstract summary: We consider compatibility in quantum interferometry for an important class of probe states and for double homodyne measurement.<n>We include the presence of loss and phase diffusion in the estimation of a phase.
Score: 0.25602836891933073
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: While the performance of single-parameter quantum sensors is immediate to assess by means of the Cram\'er-Rao bound, extension to multiple parameters demands more caution. Different aspects need to be captured at once, including, critically, compatibility. In this article we consider compatibility in quantum interferometry for an important class of probe states and for double homodyne measurement, standard benchmarks for these applications. We include the presence of loss and phase diffusion in the estimation of a phase. Our results illustrate how different weighting of the precision on individual parameters affects their compatibility, adding to the list of considerations for quantum multiparameter estimation.

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