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Sequential state discrimination of coherent states

Title
Sequential state discrimination of coherent states
Author
권영헌
Keywords
NONORTHOGONAL QUANTUM STATES; UNAMBIGUOUS DISCRIMINATION; CRYPTOGRAPHY; STRATEGIES
Issue Date
2018-11
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 8, Article no. 16915
Abstract
Sequential state discrimination is a strategy for quantum state discrimination of a sender's quantum states when N receivers are separately located. In this report, we propose optical designs that can perform sequential state discrimination of two coherent states. For this purpose, we consider not only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior probabilities. Since our optical designs do not include electric feedback, they can be implemented without difficulty. Furthermore, we analyze our proposal for the case of photon loss. We also demonstrate that sequential state discrimination of two coherent states performs better than the probabilistic quantum cloning strategy. This proposal can facilitate multiparty QKD based on coherent states.
URI
https://www.nature.com/articles/s41598-018-35047-6/https://repository.hanyang.ac.kr/handle/20.500.11754/98774
ISSN
2045-2322
DOI
10.1038/s41598-018-35047-6
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > APPLIED PHYSICS(응용물리학과) > Articles
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