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Near-Maximal Two-Photon Entanglement for Optical Quantum Communication at 2.1μm
- Source :
- Physical Review Applied. 16
- Publication Year :
- 2021
- Publisher :
- American Physical Society (APS), 2021.
-
Abstract
- Owing to a reduced solar background and low propagation losses in the atmosphere, the 2- to 2.5-μm waveband is a promising candidate for daylight quantum communication. This spectral region also offers low losses and low dispersion in hollow-core fibers and in silicon waveguides. We demonstrate for the first time near-maximally entangled photon pairs at 2.1 μm that could support device independent quantum key distribution (DIQKD) assuming sufficiently high channel efficiencies. The state corresponds to a positive secure-key rate (0.254 bits/pair, with a quantum bit error rate of 3.8%) based on measurements in a laboratory setting with minimal channel loss and transmission distance. This is promising for the future implementation of DIQKD at 2.1 μm.
Details
- ISSN :
- 23317019
- Volume :
- 16
- Database :
- OpenAIRE
- Journal :
- Physical Review Applied
- Accession number :
- edsair.doi...........82f0449daa4e159533a13d8c35466dd2