Quantum Sensors: Improved Optical Measurement via Specialized Quantum States

Abstract

Classical measurement strategies in many areas are approaching their maximum resolution and sensitivity levels, but these levels often still fall far short of the ultimate limits allowed by the laws of physics. To go further, strategies must be adopted that take into account the quantum nature of the probe particles and that optimize their quantum states for the desired application. Here, we review some of these approaches, in which quantum entanglement, the orbital angular momentum of single photons, and quantum interferometry are used to produce optical measurements beyond the classical limit.

References in corpus (9)

• Photonic quantum technologies
• Optimal Quantum Phase Estimation
• Object Identification Using Correlated Orbital Angular Momentum States
• Phase detection at the quantum limit with multi-photon Mach-Zehnder interferometry
• Quantum-inspired interferometry with chirped laser pulses
• Phase-conjugate optical coherence tomography
• Odd- and even-order dispersion cancellation in quantum interferometry
• High Capacity Imaging and Rotationally Insensitive Object Identification with Correlated Orbital Angular Momentum States
• Dispersion and fidelity in quantum interferometry