Quantum message exchange based on entanglement and Bell-state measurements

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...

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Bibliographic Details
Published in:Physics letters. A 2005-05, Vol.339 (6), p.430-439
Main Authors: Jang, Sung Soon, Lee, Hai-Woong
Format: Article
Language:English
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Summary: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.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2005.03.057