Enhancing quantum sensing and interferometry through entanglement

James F. Smith III

doi:10.1117/12.2662691

13 June 2023 Enhancing quantum sensing and interferometry through entanglement

James F. Smith III

Proceedings Volume 12517, Quantum Information Science, Sensing, and Computation XV ; 1251709 (2023) https://doi.org/10.1117/12.2662691
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Novel multiphoton entangled states have been developed, which offer utility for sensors. These states are linear combinations of M&N states (LCMNS). Closed form expressions for the coefficients have been derived that result in states offering sensitivities far greater than those found in the literature. Adaptive optics procedures have been conceived that permit these coefficients to be determined. LCMNS can also be used to generate high quality hyperentangled states. Various states generated by this process are developed. The utility of these procedures for quantum interferometry and RF signal detection is examined. The susceptibility to loss of the various interferometry and RF detection approaches is examined using an open systems analysis. The novel quantum interferometer uses adaptive optics, which offers a huge improvement in phase sensitivity over previous interferometers, while greatly reducing the number of photons used. Large numbers of photons can contribute to vibration reducing sensitivity. The approach based on entanglement presented here, even in the presence of loss can reduce the number of photons used significantly, while enhancing phase sensitivity. The new interferometer simultaneously minimizes phase error, maximizes visibility and greatly reduces the number of photons used. When the interferometer employing LCMNS is combined with an atomic RF antenna, E-field sensitivity is increased to a value nearly 400,000 times that found in the literature. Extensive numerical results are provided comparing phase sensitivity, visibility and E-field sensitivity for LCMNS, N00N states, and non-entangled states. LCMNS offer huge improvements in sensitivity compared to other approaches.

Conference Presentation

Citation Download Citation

James F. Smith III "Enhancing quantum sensing and interferometry through entanglement", Proc. SPIE 12517, Quantum Information Science, Sensing, and Computation XV , 1251709 (13 June 2023); https://doi.org/10.1117/12.2662691

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