Critical quantum sensing based on the Jaynes-Cummings model with a squeezing drive

TL;DR

This paper proposes a quantum sensing method leveraging criticality in a parametrically driven Jaynes-Cummings model, which relaxes the need for ultrastrong coupling and enhances measurement precision.

Contribution

It introduces a novel approach to quantum sensing using the driven JC model, avoiding the challenging ultrastrong coupling requirement of the QRM.

Findings

Criticality in the driven JC model can be exploited for quantum sensing.

The method relaxes the experimental requirement of ultrastrong coupling.

Potential for practical implementation of critical quantum sensing.

Abstract

Quantum sensing improves the accuracy of measurements of relevant parameters by exploiting the unique properties of quantum systems. The divergent susceptibility of physical systems near a critical point for quantum phase transition enables criticality-enhanced quantum sensing. The quantum Rabi model (QRM), composed of a single qubit coupled to a single bosonic field, represents a good candidate for realizing such critical enhancement for its simplicity, but it is experimentally challenging to achieve the ultrastrong qubit-field coupling required to realize the critical phenomena. In this work, we explore an alternative to construct the analog of the QRM for the sensing, exploiting the criticality appearing in the Jaynes-Cummings (JC) model whose bosonic field is parametrically driven, not necessitating the ultrastrong coupling condition thus to some extent relaxing the requirement for the practical implementation.