The Multiparty Coherent Channel and its Implementation with Linear Optics

Details The Multiparty Coherent Channel and its Implementation with Linear Optics The Multiparty Coherent Channel and its Implementation with Linear Optics

2010-03-08

arxiv.org/abs/1003.1552v1

Physics

Quantum Physics

13 pages, 4figures

Scientific paper

The coherent nat (conat) channel is a useful resource for coherent communication, producing coherent teleportation and coherent superdense coding. We extend the conat channel to multiparty conat channel by giving a definition of it including the multiparty position-quadrature conat channel and the multiparty momentum-quadrature conat channel. We provide two methods to implement this channel using linear optics. One method is the multiparty version of coherent communication assisted by entanglement and classical communication (CCAECC). The other is multiparty coherent superdense coding. Finally, we discuss the new applications of this channel in controlled teleportation and quantum secret sharing (QSS).

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