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Field Demonstration of Distributed Quantum Sensing without Post-Selection
- Source :
- Physical Review X, Vol 11, Iss 3, p 031009 (2021), OFC, Web of Science
- Publication Year :
- 2021
- Publisher :
- American Physical Society (APS), 2021.
-
Abstract
- Distributed quantum sensing can provide quantum-enhanced sensitivity beyond the shot-noise limit (SNL) for sensing spatially distributed parameters. To date, distributed quantum sensing experiments have been mostly accomplished in laboratory environments without a real space separation for the sensors. In addition, the post-selection is normally assumed to demonstrate the sensitivity advantage over the SNL. Here, we demonstrate distributed quantum sensing in field and show the unconditional violation (without post-selection) of SNL up to 0.916 dB for the field distance of 240 m. The achievement is based on a loophole free Bell test setup with entangled photon pairs at the averaged heralding efficiency of 73.88%. Moreover, to test quantum sensing in real life, we demonstrate the experiment for long distances (with 10-km fiber) together with the sensing of a completely random and unknown parameter. The results represent an important step towards a practical quantum sensing network for widespread applications.<br />8 pages, 5 figures
- Subjects :
- Physics
Quantum network
Quantum Physics
Photon
Boosting (machine learning)
Field (physics)
Computer science
QC1-999
Quantum sensor
FOS: Physical sciences
General Physics and Astronomy
Topology
Fiber optic sensor
Limit (music)
Electronic engineering
Limit (mathematics)
Sensitivity (control systems)
Quantum Physics (quant-ph)
Selection (genetic algorithm)
Subjects
Details
- ISSN :
- 21603308
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Physical Review X
- Accession number :
- edsair.doi.dedup.....119e54a5232fc687bc465e37c147d952