Experimental Quantum Enhanced Optical Interferometry

TL;DR

This paper reviews recent experimental advances in quantum-enhanced optical interferometry, highlighting new schemes, their advantages, and potential applications in quantum metrology and gravitational wave detection.

Contribution

It provides a comprehensive overview of experimental quantum interferometry schemes, their advantages, and future development prospects.

Findings

Successful implementation of quantum-enhanced interferometry schemes

Demonstration of applications in gravitational wave detection

Expansion of quantum interferometry to new experimental setups

Abstract

Optical quantum interferometry represents the oldest example of quantum metrology and it is at the source of quantum technologies. The original squeezed state scheme is now a significant element of the last version of gravitational wave detectors and various additional uses have been proposed. Further quantum enhanced schemes, from SU(1,1) interferometer to twin beam correlation interferometry, have also reached the stage of proof of principle experiments enlarging the field of experimental quantum interferometry and paving the way to several further applications ranging from Planck scale signals search to small effects detection. In this review paper I introduce these experimental achievements, describing their schemes, advantages, applications and possible further developments.