Entropy 2019, 21(4), 333; https://doi.org/10.3390/e21040333
Simultaneous Classical Communication and Quantum Key Distribution Based on Plug-and-Play Configuration with an Optical Amplifier
1
School of Automation, Central South University, Changsha 410083, China
2
Jiangsu Key Construction Laboratory of IoT Application Technology, Wuxi Taihu University, Wuxi 214064, China
*
Authors to whom correspondence should be addressed.
Received: 28 January 2019 / Revised: 13 March 2019 / Accepted: 26 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Relativistic Quantum Information)
Abstract
We propose a simultaneous classical communication and quantum key distribution (SCCQ) protocol based on plug-and-play configuration with an optical amplifier. Such a protocol could be attractive in practice since the single plug-and-play system is taken advantage of for multiple purposes. The plug-and-play scheme waives the necessity of using two independent frequency-locked laser sources to perform coherent detection, thus the phase noise existing in our protocol is small which can be tolerated by the SCCQ protocol. To further improve its capabilities, we place an optical amplifier inside Alice’s apparatus. Simulation results show that the modified protocol can well improve the secret key rate compared with the original protocol whether in asymptotic limit or finite-size regime. View Full-TextKeywords:
simultaneous; classical communication; quantum key distribution; plug-and-play configuration; optical amplifier
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Wu, X.; Wang, Y.; Liao, Q.; Zhong, H.; Guo, Y. Simultaneous Classical Communication and Quantum Key Distribution Based on Plug-and-Play Configuration with an Optical Amplifier. Entropy 2019, 21, 333.
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