Quadratic Enhancement in the Reliability of Collective Quantum Engines
- URL: http://arxiv.org/abs/2208.04250v2
- Date: Wed, 12 Apr 2023 06:03:26 GMT
- Title: Quadratic Enhancement in the Reliability of Collective Quantum Engines
- Authors: Noufal Jaseem, Sai Vinjanampathy and Victor Mukherjee
- Abstract summary: We study fluctuations in many-body quantum heat engines operating in the presence of collective system-bath interactions.
We show that collective effects in open quantum systems can be harnessed to develop highly consistent many-body quantum engines.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study fluctuations in many-body quantum heat engines operating in the
presence of collective system-bath interactions. We show that collective
effects in open quantum systems can be harnessed to develop highly consistent
many-body quantum engines. We consider quantum Otto engines, modeled by $n$
spins collectively coupled to thermal baths. Our results show that collective
effects can significantly reduce the fluctuations in the output work,
quantified by high reliability ($r$) and low thermodynamic uncertainty. In
contrast to independent engines, we demonstrate a quadratic enhancement of the
reliability $r$ for their collective counterparts. We extend our analysis to
the case of interacting spin models commonly studied in many-body physics, such
as the Lipkin-Meshkov-Glick (LMG) model, thereby broadening the regime of
applicability of collective effects in quantum thermal machines significantly.
This paves the way forward for realistic collective quantum thermal machines in
many body systems.
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