Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 18: Quantum Information: Concepts and Methods III
Q 18.7: Talk
Tuesday, March 1, 2016, 12:30–12:45, e214
Trace-norm contraction under tensor product channels — •David Reeb1 and Peter Vrana2 — 1Institut für Theoretische Physik, Leibniz Universität Hannover — 2Budapest University of Technology and Economics
We establish upper bounds on the information storage time in a quantum memory under independent noise in the case where active error correction is allowed. For this, we provide an upper bound on the trace-norm contraction coefficient of a tensor product of quantum channels. Our method yields nontrivial bounds in cases where others fail. Specializing to qubit channels, this solves a conjecture by Ben-Or/Gottesmann/Hassidim concerning the Quantum Refrigerator model of computation (arXiv:1301.1995).