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Report on 1808.09395v1
We study the reduced time-evolution of general open quantum systems by combining insights from quantum-information and statistical field theory.Inspired by prior work [EPL 102, 60001 (2013) and Phys.Rev. Lett.111, 050402 (2013)] we establish the explicit structure guaranteeing the complete positivity (CP) and trace-preservation (TP) of the real-time evolution expansion in …