Journal
PHYSICAL REVIEW A
Volume 65, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.65.012318
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I show that a simple multiparty communication task can be performed more efficiently with quantum communication than with classical communication, even with low detection efficiency eta. The task is a communication complexity problem in which distant parties need to compute a function of the distributed inputs, while minimizing the amount of communication between them, A realistic quantum optical setup is suggested that can demonstrate a five-party quantum protocol with higher-than-classical performance, provided eta>0.33.
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