2018/12/10 by F. Y. Khalili, Khalili, F. Ya., F. Ya. Khalili
Biochemistry, Genetics and Molecular Biology · Computer Science · Physics and Astronomy · #FOS: Physical sciences #Laser-Matter Interactions and Applications #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #Random lasers and scattering media #Spectroscopy Techniques in Biomedical and Chemical Research
paper · pdf · doi:10.48550/arxiv.1812.03727
openalex publication_date 2018/12/10 · openalex created_date 2022/08/01 · openalex updated_date 2026/07/28
We show that by injecting a light pulse prepared in a non-Gaussian quantum\nstate into the dark port of a two-arm interferometer, it is possible to detect\na given phase shift with the fidelity which is limited only by the optical\nlosses and the photodetection inefficiency. The value of the phase shift is\ninversely proportional to the amplitude of the classical carrier light injected\ninto another (bright) port of the interferometer. It can be reduced by using an\nadditional degenerate parametric amplifier (squeezer) in the input dark port\nand the matching anti-squeezer in the output dark port.\n We show that using the modern high-efficiency photon number resolving\ndetectors, it is possible to reduce the detection error by almost one order of\nmagnitude in comparison with the ordinary (Gaussian-state) interferometry.\n