Enhanced Dark Matter Quantum Sensing via Geometric Phase

TL;DR

This paper introduces a quantum sensing protocol that uses geometric phase to improve dark matter detection sensitivity in coupled qubit-oscillator systems, surpassing the standard quantum limit.

Contribution

It presents a novel protocol combining displacements and squeezing to map dark matter signals onto an enhanced geometric phase, improving detection sensitivity.

Findings

Quantum Fisher information surpasses standard quantum limit.

Enhanced detection sensitivity for dark photons and axions.

New paradigm for cavity-based dark matter detection.

Abstract

We propose a quantum sensing protocol for coupled qubit-oscillator systems that surpasses the standard quantum limit by exploiting a geometric phase for dark matter searches. Instead of letting the cavity evolve freely under a weak dark matter background, we combine large coherent displacements and squeezing operations within the evolution protocol, thereby mapping the signal onto an enhanced geometric phase. This new protocol increases the quantum Fisher information to surpass standard quantum limit and leads to a substantial improvement in dark photon and axion detection sensitivity, opening a new paradigm for cavity-based dark matter detection.