Equidistant quenches in few-level quantum systems
- URL: http://arxiv.org/abs/2102.06161v4
- Date: Sun, 10 Oct 2021 17:02:30 GMT
- Title: Equidistant quenches in few-level quantum systems
- Authors: Sreekanth K Manikandan
- Abstract summary: We show that this is not generically the case for open quantum systems with two or three energy levels.
We find that both faster uphill and faster downhill relaxation and symmetric thermal relaxation can be observed in equidistant quenches.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: A recent work [Phys. Rev. Lett. 125, 110602] showed that among a pair of
\textit{thermodynamically} equidistant quenches from a colder and a hotter
initial state at a fixed ambient temperature, the relaxation from the colder
initial state (\textit{uphill} relaxation) is always faster, for dynamics close
to stable minima. Here we show that this is not generically the case for open
quantum systems with two or three energy levels. We find that both faster
uphill and faster downhill relaxation and symmetric thermal relaxation can be
observed in equidistant quenches, depending on the transition rates and the
choice of the distance measure used. Furthermore, we obtain a phase diagram in
the parameter space for the three-level system corresponding to different
thermalization behaviours.
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