Simple implementation of quantum key distribution based on single-photon Bell-state measurement

Autor:	Xue-Bi An, Zheng-Fu Han, Wei Chen, Guang-Can Guo, Shuang Wang, Zhen-Qiang Yin, Wen-Ye Liang, Mo Li
Rok vydání:	2015
Předmět:	Physics Protocol (science) Bell state Quantum cryptography SIMPLE (military communications protocol) Electronic engineering Key (cryptography) Quantum key distribution Interference (wave propagation) BB84 Atomic and Molecular Physics and Optics
Zdroj:	Physical Review A. 92
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.92.012319
Popis:	Recently some alternatives to the measurement-device-independent (MDI) quantum key distribution (QKD) based on the single-photon Bell-state measurement (SBSM) were proposed. Although these alternatives are not precisely as secure as the MDI QKD, they possess the advantage of a high key rate of the traditional BB84-like protocol and avoid the technical complexity of two-photon interference required in the MDI QKD. However, the setups of these proposed schemes are rather complicated compared to commonly used BB84 systems. Here we propose a simple implementation of SBSM-based QKD that is directly built on the existing realization of the BB84 QKD. Our proposal exhibits the hidden connection between the SBSM-based QKD and traditional phase-encoding QKD protocols. This finding discloses the physics behind these two different types of QKD protocols. In addition, we experimentally demonstrate the feasibility of our protocol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ef47f02d40dad4014e7acc76f3dc4eb1 https://doi.org/10.1103/physreva.92.012319 Zobrazit plný text záznamu