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Q: Quantenoptik und Photonik
Q 7: Quantenkommunikation
Q 7.8: Talk
Monday, March 22, 2004, 18:15–18:30, HS 101
Breaking entanglement in noisy channels — •Thomas Konrad1, Jürgen Audretsch1, and Lajos Diosi2 — 1Fachbereich Physik Universität Konstanz — 2Research Institute for Particle and Nuclear Physics, Budapest
How noisy is a quantum communication channel allowed to be before it completely destroys the entanglement between two quantum systems, one of which traverses the channel? We address this question by relating a rather abstract criterion [1] for entanglement breaking maps to a quantity which characterizes the channel noise . On the way some properties of entanglement breaking maps are reviewed.
[1] M. Horodecki, P.W. Shor and M.B.Ruskai, No-dqEntanglement Breaking ChannelsNo-dq quant-ph/0302031