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Quantum receiver for phase-shift keying at the single photon level
- Source :
- Sidhu, J S, Izumi, S, Neergaard-Nielsen, J S, Lupo, C & Andersen, U L 2021, ' Quantum Receiver for Phase-Shift Keying at the Single-Photon Level ', PRX Quantum, vol. 2, no. 1, 010332 . https://doi.org/10.1103/PRXQuantum.2.010332
- Publication Year :
- 2021
- Publisher :
- SPIE, 2021.
-
Abstract
- Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.<br />11 pages with 10 figures with appendices. Extended analysis. Accepted version
- Subjects :
- Quantum Physics
Computer science
Quantum limit
General Engineering
Optical communication
FOS: Physical sciences
Quantum channel
Photodetection
01 natural sciences
010305 fluids & plasmas
Quantum state
0103 physical sciences
Electronic engineering
General Earth and Planetary Sciences
Quantum information
010306 general physics
Quantum information science
Quantum Physics (quant-ph)
QC
General Environmental Science
Phase-shift keying
Subjects
Details
- ISSN :
- 26913399
- Database :
- OpenAIRE
- Journal :
- Quantum Technology: Driving Commercialisation of an Enabling Science II
- Accession number :
- edsair.doi.dedup.....6de37ee53d4405bed00d9d25f035afb7