Ju l 2 00 5 Quantum Interferometric Sensors (original) (raw)

Quantum interferometric sensors

2005

Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many Concepts of Physics, Vol. II (2005) 225orders of magnitude improvement in interferometer sensitivity. The quantum-entangled particle interferometer approach is very general and applies to many types of interferometers. In particular, without nonlocal entanglement, a generic classical interferometer has a statistical-sampling shot-noise limited sensitivity that scales like 1 / √ N, where N is the number of particles passing through the interferometer per unit time. However, if carefully prepared quantum correlations are engineered between the particles, then the interferometer sensitivity improves by a factor of √ N to scale like 1/N, which is the limit imposed by the Heisenberg Uncertainty Principle. For optical interferometers operating at milliwatts of

Invited Paper Quantum Interferometric Sensors

2013

Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many orders of magnitude improvement in interferometer sensitivity. The quantum entangled particle interferometer approach is very general and applies to many types of interferometers. In particular, without nonlocal entanglement, a generic classical interferometer has a statistical-sampling shot-noise limited sensitivity that scales like 1 / √ N,whereN is the number of particles passing through the interferometer per unit time. However, if carefully prepared quantum correlations are engineered between the particles, then the interferometer sensitivity improves by a factor of √ N to scale like 1/N, which is the limit imposed by the Heisenberg Uncertainty Principle. For optical interferometers operating at milliwatts of optical power, this quantum sensitivity boost corresponds to an eight-order-of-magnitude improvement of signal to noise. This effect can translate into a t...

Improving quantum interferometry by using entanglement

2002

An interferometric setup is devised to reveal minute perturbations to a given configuration. Such perturbations may be induced by the environment or by the action of a given device. In an interferometer, the internal quantum operation is monitored by probing the output state, which, in turn, results from the evolution of a given input. By suitably choosing the input signal and the detection stage one optimizes the interferometric measurement.

Quantum Sensors: Improved Optical Measurement via Specialized Quantum States

2015

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.