Quantum jump approach to microscopic heat engines
- URL: http://arxiv.org/abs/2005.12231v2
- Date: Sat, 26 Sep 2020 15:48:30 GMT
- Title: Quantum jump approach to microscopic heat engines
- Authors: Paul Menczel, Christian Flindt, Kay Brandner
- Abstract summary: Modern technologies could soon make it possible to investigate the operation cycles of quantum heat engines by counting the photons that are emitted and absorbed by their working systems.
We show that such experiments would give access to a set of observables that determine the trade-off between power and efficiency in finite-time engine cycles.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Modern technologies could soon make it possible to investigate the operation
cycles of quantum heat engines by counting the photons that are emitted and
absorbed by their working systems. Using the quantum jump approach to
open-system dynamics, we show that such experiments would give access to a set
of observables that determine the trade-off between power and efficiency in
finite-time engine cycles. By analyzing the single-jump statistics of
thermodynamic fluxes such as heat and entropy production, we obtain a family of
general bounds on the power of microscopic heat engines. Our new bounds unify
two earlier results and admit a transparent physical interpretation in terms of
single-photon measurements. In addition, these bounds confirm that
driving-induced coherence leads to an increase in dissipation that suppresses
the efficiency of slowly driven quantum engines in the weak-coupling regime. A
nanoscale heat engine based on a superconducting qubit serves as an
experimentally relevant example and a guiding paradigm for the development of
our theory.
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