Journal
ADVANCED QUANTUM TECHNOLOGIES
Volume 5, Issue 12, Pages -Publisher
WILEY
DOI: 10.1002/qute.202200039
Keywords
quantum optics; quantum state engineering; remote quantum sensing
Categories
Funding
- EU under the ERA-NET QuantERA project ShoQC [731473]
- FET Flagship on Quantum Technologies project Qombs [820419]
- MCIN / AEI [PID2020-115761RJ-I00]
- la Caixa Foundation [100010434]
- European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie [847648, LCF/BQ/PI21/11830025]
- Generalitat Valenciana [CDEIGENT/2021/014]
- Consiglio Nazionale delle Ricerche within the CRUI-CARE Agreement
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A remote phase sensing scheme is proposed and experimentally tested, showing a sensitivity that scales with the intensity of the local coherent states.
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.
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