Quantum communication with time-bin entanglement over a wavelength-multiplexed fiber network
SCIE
SCOPUS
- Title
- Quantum communication with time-bin entanglement over a wavelength-multiplexed fiber network
- Authors
- Kim, Jin-Hun; Chae, Jin-Woo; Jeong, Youn-Chang; Kim, Yoon-Ho
- Date Issued
- 2022-01
- Publisher
- AIP Publishing LLC | American Institute of Physics
- Abstract
- In a quantum network involving multiple communicating parties, an important goal is to establish high-quality pairwise entanglement among the users without introducing multiple entangled-photon sources which would necessarily complicate the overall network setup. Moreover, it is preferable that the pairwise entanglement of photons is in the time-bin degree of freedom as the photonic time-bin qubit is ideally suited for fiber-optic distribution. Here, we report an experimental demonstration of a field-deployable quantum communication network involving multiple users, all of whom share pairwise entanglement in the time-bin degree of freedom of photons. In particular, by utilizing a single spontaneous-parametric down-conversion source which produces a broadband pair of photons and the wavelength-division demultiplexing/multiplexing technology, all the communicating parties within the network are always simultaneously ready for quantum communication. To further demonstrate the practical feasibility of a quantum network with time-bin entanglement over a wavelength-multiplexed fiber network, we demonstrate entangled-photon quantum key distribution with three users, each separated by 60 km of optical fibers.& nbsp;(c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110803
- DOI
- 10.1063/5.0073040
- ISSN
- 2378-0967
- Article Type
- Article
- Citation
- APL Photonics, vol. 7, no. 1, 2022-01
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.