Non-Markovian thermal operations boosting the performance of quantum
heat engines
- URL: http://arxiv.org/abs/2203.14671v4
- Date: Tue, 12 Jul 2022 15:41:01 GMT
- Title: Non-Markovian thermal operations boosting the performance of quantum
heat engines
- Authors: Krzysztof Ptaszy\'nski
- Abstract summary: It is investigated whether non-Markovianity, i.e., the memory effects resulting from the coupling of the system to its environment, can be beneficial for the performance of quantum heat engines.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: It is investigated whether non-Markovianity, i.e., the memory effects
resulting from the coupling of the system to its environment, can be beneficial
for the performance of quantum heat engines. Specifically, two physical models
are considered. The first one is a well known single-qubit Otto engine; the
non-Markovian behaviour is there implemented by replacing standard
thermalization strokes with so-called extremal thermal operations which cannot
be realized without the memory effects. The second one is a three-stroke engine
in which the cycle consists of two extremal thermal operations and a single
qubit rotation. It is shown that the non-Markovian Otto engine can generate
more work-per-cycle for a given efficiency than its Markovian counterpart,
whereas performance of both setups is superior to the three-stroke engine.
Furthermore, both the non-Markovian Otto engine and the three-stroke engine can
reduce the work fluctuations in comparison with the Markovian Otto engine, with
their relative advantage depending on the performance target. This demonstrates
the beneficial influence of non-Markovianity on both the average performance
and the stability of operation of quantum heat engines.
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