Localization Driven Quantum Sensing

TL;DR

This paper explores how the delocalization-localization transition in quantum many-body systems can be harnessed as a resource for enhanced quantum sensing, proposing observable-based sensors with significant advantages.

Contribution

It introduces experimentally relevant quantum observables for precision measurement leveraging the delocalization-localization transition in quantum many-body systems.

Findings

Quantum many-body systems near transition points enhance sensitivity.

Operator-based adiabatic and dynamical sensors outperform classical counterparts.

Proposed sensors are feasible with current experimental setups.

Abstract

We show that the delocalization-localization transition in a quantum-many body (QMB) systems is a compelling quantum resource for achieving quantum-enhanced sensitivity in parameter estimation. We exploit the vulnerability of a near-transition QMB state against the parameter shift for devising efficient sensing tools. In this realm the main focus of this work is to identify, propose and analyze experimentally relevant quantum observables for precision measurement. Taking a QMB system as a Fermi lattice under quasi-periodic modulation that supports an energy-independent delocalization-localization transition, we suggest operator-based adiabatic and dynamical quantum sensors endowed with considerable quantum advantages.