Quantum Message Exchange Based on Entanglement and Bell-State Measurements

Details Quantum Message Exchange Based on Entanglement and Bell-State Measurements Quantum Message Exchange Based on Entanglement and Bell-State Measurements

2005-04-25

arxiv.org/abs/quant-ph/0504182v1

Physics

Quantum Physics

To be published in Physics Letters A; supersedes quant-ph/0407138. This version includes a fair amount of new material, includ

Scientific paper

10.1016/j.physleta.2005.03.057

We propose a scheme by which two parties can secretely 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.

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