Kraus decomposition for chaotic environments

Details Kraus decomposition for chaotic environments Kraus decomposition for chaotic environments

2007-09-22

arxiv.org/abs/0709.3608v1

Physics Letters A, Volume 372, Issue 7, 11 February 2008, Pages 990-996

Physics

Quantum Physics

Scientific paper

10.1016/j.physleta.2007.08.064

We consider a system interacting with a chaotic thermodynamic bath. We derive an explicit and exact Kraus operator sum representation (OSR) for the open system reduced density. The OSR preserves the Hermiticity, complete positivity and norm. We show that it is useful as a numerical tool by testing it against exact results for a qubit interacting with an isolated flawed quantum computer. We also discuss some interesting qualitative aspects of the OSR.

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