Quantum sensing represents a paradigm shift in the science of measurement. It leverages the intrinsic quantum properties of particles and their wave functions, such as superposition, entanglement, and coherence, to achieve unparalleled sensitivity, precision, and miniaturization. This talk will present a practical engineering perspective on quantum sensing, linking fundamental quantum principles to real-world applications. Key enabling technologies will be reviewed, such as single-photon detectors, nitrogen-vacancy (NV) centers in diamond, and Rydberg atoms. Additionally, we will examine the integration of quantum sensing approaches with optical fiber systems, highlighting advances in distributed sensing capabilities enabled by quantum detectors. The discussion emphasizes the advantages of quantum measurement techniques over classical methods. Finally, we will outline the emerging domain of quantum sensing applications alongside the ongoing miniaturization and cost reduction of quantum devices, demonstrating their potential to transform multiple scientific and industrial fields.
