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Optical phase estimation via coherent state and displaced photon counting
- Publication Year :
- 2016
-
Abstract
- We consider the phase sensing via a weak optical coherent state at quantum limit precision. A detection scheme for the phase estimation is proposed, which is inspired by the suboptimal quantum measurement in coherent optical communication. We theoretically analyze a performance of our detection scheme, which we call the displaced-photon counting, for phase sensing in terms of the Fisher information and show that the displaced-photon counting outperforms the static homodyne and heterodyne detections in a wide range of the target phase. The proof-of-principle experiment is performed with linear optics and a superconducting nanowire single-photon detector. The result shows that our scheme overcomes the limit of the ideal homodyne measurement, even under practical imperfections.
- Subjects :
- Physics
Heterodyne
Quantum Physics
business.industry
Quantum limit
Detector
Optical communication
Phase (waves)
FOS: Physical sciences
Physics::Optics
01 natural sciences
Photon counting
010309 optics
Direct-conversion receiver
Optics
0103 physical sciences
Coherent states
010306 general physics
business
Quantum Physics (quant-ph)
Optics (physics.optics)
Physics - Optics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....0a4346d555f8d1adbf0ff56d1aac4989