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On environment-assisted capacities of quantum channels
2005
arXiv
pre-print
Following initial work by Gregoratti and Werner [J. Mod. Optics 50, 913-933, 2003 and quant-ph/0403092] and Hayden and King [quant-ph/0409026], we study the problem of the capacity of a quantum channel assisted by a "friendly (channel) environment" that can locally measure and communicate classical messages to the receiver. Previous work [quant-ph/0505038] has yielded a capacity formula for the quantum capacity under this kind of help from the environment. Here we study the problem of the
arXiv:quant-ph/0507045v1
fatcat:qtvajxh7qvcmnjoq6hb3i53jjy