Quantum message exchange based on entanglement and Bell-state measurements

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We propose a scheme by which two parties can secretly and simultaneously exchange messages. The scheme requires the two parties to share entanglement and both to perform Bell-state measurements. Only two out of the four Bell states are required to be distinguished in the Bell-state measurements, and thus the scheme is experimentally feasible using only linear optical means. Generalizations of the scheme to high-dimensional systems and to multipartite entanglement are considered. We show also that the proposed scheme works even if the two parties do not possess shared reference frames. (c) 2005 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2005-05
Language
English
Article Type
Article
Keywords

TELEPORTATION; CRYPTOGRAPHY; INFORMATION; ENSEMBLES; PHOTONS; THEOREM

Citation

PHYSICS LETTERS A, v.339, pp.430 - 439

ISSN
0375-9601
DOI
10.1016/j.physleta.2005.03.057
URI
http://hdl.handle.net/10203/13793
Appears in Collection
PH-Journal Papers(저널논문)
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