Efficient bounds on quantum-communication rates via their reduced variants
Thu, 2011-02-17 13:35 - Q-Essence Coordinator
Date:
2010-10-29
Reference:
Marcin L. Nowakowski and Pawel Horodecki
Phys. Rev. A 82, 042342 (2010)
http://link.aps.org/doi/10.1103/PhysRevA.82.042342
We investigate one-way communication scenarios where Bob operating on his component can transfer some subsystem to the environment. We define reduced versions of quantum-communication rates and, further, prove upper bounds on a one-way quantum secret key, distillable entanglement, and quantum-channel capacity by means of their reduced versions. It is shown that in some cases they drastically improve their estimation.
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