Cooperative Sensing with Impurities in a Two-Dimensional Subwavelength Array

TL;DR

This paper introduces a quantum sensing protocol using impurity atoms in a 2D atomic array, leveraging cooperative effects for enhanced sensitivity to frequency shifts, with robustness against environmental disturbances.

Contribution

It presents a novel quantum sensing method employing dissipatively coupled impurities in a 2D array, enabling efficient detection of frequency shifts with analytical sensitivity estimates.

Findings

Enhanced sensitivity through cooperative effects in the array

Robustness of the protocol against environmental perturbations

Analytical estimates of achievable sensitivities

Abstract

We propose a versatile quantum sensing protocol based on two dissipatively coupled distant atoms embedded as impurities in a two-dimensional sub-wavelength atomic array. The array acts as a waveguide for the emitter light, creating cooperative enhancement that allows for more efficient population transfer. By monitoring the population of one of the impurity atoms, it is possible to detect frequency shifts in the emitters' resonance frequencies. We analytically estimate achievable sensitivities as well as the dependence on various system parameters. The proposed protocol is robust against various environmental factors and perturbations, which enhances its applicability in real-world scenarios.