Quantum sensors and their limits

Institut quantique et Dèpartement de Physique, Universitè de Sherbrooke, Sherbrooke J1K 2R1, Quèbec, Canada

^* Mathieu.Juan@USherbrooke.ca

Abstract

A fundamental aspect of quantum systems lies in their extreme sensitivity to external perturbations. This characteristic, which generally represents a considerable challenge for physicists seeking to isolate these systems in order to observe their quantum properties, can actually be transformed into an advantage. Indeed, this intrinsic sensitivity makes quantum systems ideal candidates for high-precision metrology. Quantum sensors exploit this susceptibility to measure physical quantities with precision difficult to match with classical approaches.