Remote Phase Sensing by Coherent Single Photon Addition

Year: 2022

Authors: Biagi N., Francesconi S., Gessner M., Bellini M., Zavatta A.

Autors Affiliation: Ist Nazl Ott CNR INO, Lgo E Fermi 6, I-50125 Florence, Italy; Univ Firenze, LENS, I-50019 Florence, Italy; Univ Firenze, Dept Phys & Astron, I-50019 Florence, Italy; Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Av Carl Friedrich Gauss 3, Barcelona 08860, Spain; Univ Valencia, Dept Fis Teor, IFIC, CSIC, C Dr Moliner 50, Valencia 46100, Spain.

Abstract: A remote phase sensing scheme is proposed, inspired by the high sensitivity of the entanglement produced by coherent multimode photon addition on the phase set in the remote heralding apparatus. By exploring the case of delocalized photon addition over two modes containing identical coherent states, the optimal observable to perform remote phase estimation from heralded quadrature measurements is derived. The technique is experimentally tested with calibration measurements and then used for estimating a remote phase with a sensitivity that is found to scale with the intensity of the local coherent states, which never interacted with the sample.

Journal/Review: ADVANCED QUANTUM TECHNOLOGIES

Volume: 5 (12)      Pages from:   to:

More Information: N.B., S.F., M.B., and A.Z. gratefully acknowledge the support of the EU under the ERA-NET QuantERA project ShoQC (grant No. 731473) and the FET Flagship on Quantum Technologies project Qombs (grant no. 820419). M.G. acknowledges funding from MCIN / AEI for the project PID2020-115761RJ-I00, support of a fellowship from la Caixa Foundation (ID 100010434) and from the European Union’s Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No 847648, fellowship code LCF/BQ/PI21/11830025, and from the Generalitat Valenciana (CDEIGENT/2021/014).; Open access funding provided by Consiglio Nazionale delle Ricerche within the CRUI-CARE Ag reement.
KeyWords: quantum optics; quantum state engineering; remote quantum sensing
DOI: 10.1002/qute.202200039

ImpactFactor: 4.400

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