Squeezing-induced quantum-enhanced multiphase estimation

TL;DR

This paper explores how squeezing techniques can be used to enhance measurement precision in multiphase quantum metrology, providing theoretical and numerical insights into achieving quantum limits.

Contribution

It investigates the mechanism of quantum enhancement in multiphase estimation using squeezing, filling a gap in understanding compared to single-phase cases.

Findings

Optimal conditions for reaching the quantum Cramer-Rao bound identified

Squeezing can significantly improve multiphase measurement precision

Provides theoretical and numerical analysis of quantum enhancement mechanisms

Abstract

We investigate how squeezing techniques can improve the measurement precision in multiphase quantum metrology. While these methods are well-studied and effectively used in single-phase estimations, their usage in multiphase situations has yet to be examined. We fill this gap by investigating the mechanism of quantum enhancement in the multiphase scenarios. Our analysis provides theoretical and numerical insights into the optimal condition for achieving the quantum Cramer-Rao bound, helping us understand the potential and mechanism for quantum-enhanced multiphase estimations with squeezing. This research opens up new possibilities for advancements in quantum metrology and sensing technologies.