Complete positivity, finite temperature effects, and additivity of noise for time-local qubit dynamics
Quantum Physics
2016-05-11 v1
Abstract
We present a general model of qubit dynamics which entails pure dephasing and dissipative time-local master equations. This allows us to describe the combined effect of thermalisation and dephasing beyond the usual Markovian approximation. We investigate the complete positivity conditions and introduce a heuristic model that is always physical and provides the correct Markovian limit. We study the effects of temperature on the non-Markovian behaviour of the system and show that the noise additivity property discussed by Yu and Eberly in Ref. [1] holds beyond the Markovian limit.
Keywords
Cite
@article{arxiv.1511.07202,
title = {Complete positivity, finite temperature effects, and additivity of noise for time-local qubit dynamics},
author = {Juho Lankinen and Henri Lyyra and Boris Sokolov and Jose Teittinen and Babak Ziaei and Sabrina Maniscalco},
journal= {arXiv preprint arXiv:1511.07202},
year = {2016}
}
Comments
6 pages, 2 figures