Quantum loss sensing with two-mode squeezed vacuum state under noisy and lossy environment.

ABSTRACT: We investigate quantum advantages in loss sensing when the two-mode squeezed vacuum state is used as a probe. Following an experimental demonstration in PRX 4, 011049, we consider a quantum scheme in which the signal mode is passed through the target and a thermal noise is introduced to the idler mode before they are measured. We consider two detection strategies of practical relevance: coincidence-counting and intensity-difference measurement, which are widely used in quantum sensing and imaging experiments. By computing the signal-to-noise ratio, we verify that quantum advantages persist even under strong thermal background noise, in comparison with the classical scheme which uses a single-mode coherent state that directly suffers from the thermal noise. Such robustness comes from the fa

SUBMITTER: Park SI 

PROVIDER: S-EPMC10097776 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature