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When is a quantum heat engine quantum? [PDF]
EPL (Europhysics Letters), 2017 Quantum thermodynamics studies quantum effects in thermal machines. But when is a heat engine, which cyclically interacts with external reservoirs that unavoidably destroy its quantum coherence, really quantum? We here use the Leggett-Garg inequality to assess the nonclassical properties of a single two-level Otto engine.
Friedenberger, Alexander, Lutz, Eric
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Quantum Photovoltaic Cells Driven by Photon Pulses
Entropy, 2020 We investigate the quantum thermodynamics of two quantum systems, a two-level system and a four-level quantum photocell, each driven by photon pulses as a quantum heat engine. We set these systems to be in thermal contact only with a cold reservoir while
Sangchul Oh, Jung Jun Park, Hyunchul Nha
doaj +1 more source
Experimental Verification of Fluctuation Relations with a Quantum Computer
PRX Quantum, 2021 Inspired by the idea that quantum computers can be useful in advancing basic science, we use a quantum processor to experimentally validate a number of theoretical results in non-equilibrium quantum thermodynamics, that were not (or were very little ...
Andrea Solfanelli +2 more
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Magnetically driven quantum heat engine [PDF]
Physical Review E, 2014 arXiv admin note: text overlap with arXiv:1207 ...
Muñoz-Tavera, Enrique Javier +1 more
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Dynamical heat engines with non-Markovian reservoirs
Physical Review Research, 2022 We discuss whether, and under which conditions, it is possible to realize a heat engine simply by dynamically modulating the couplings between the quantum working medium and thermal reservoirs.
Fabio Cavaliere +5 more
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Photosynthetic reaction center as a quantum heat engine. [PDF]
Proc Natl Acad Sci U S A, 2013 Two seemingly unrelated effects attributed to quantum coherence have been reported recently in natural and artificial light-harvesting systems. First, an enhanced solar cell efficiency was predicted and second, population oscillations were measured in photosynthetic antennae excited by sequences of coherent ultrashort laser pulses. Because both systems
Dorfman KE +3 more
europepmc +5 more sources
Quantum thermodynamic cycles and quantum heat engines
Physical Review E, 2007 17 pages, 9 figures, 4 ...
Quan, H. T. +3 more
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Boosting the performance of quantum Otto heat engines [PDF]
Physical Review E, 2019 To optimize the performance of a heat engine in finite-time cycle, it is important to understand the finite-time effect of thermodynamic processes. Previously, we have shown that extra work is needed to complete a quantum adiabatic process in finite time, and proved that the extra work follows a \mathcal{C}/τ^{2} scaling for long control time τ.
Chen, Jin-Fu, Sun, Chang-Pu, Dong, Hui
openaire +3 more sources
Powerful energy harvester based on resonant-tunneling quantum wells
New Journal of Physics, 2013 We analyze a heat engine based on a hot cavity connected via quantum wells to electronic reservoirs. We discuss the output power as well as the efficiency both in the linear and nonlinear regime.
Björn Sothmann +3 more
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Finite-time quantum Stirling heat engine
New Journal of Physics, 2021 We study the thermodynamic performance of a finite-time non-regenerative quantum Stirling-like cycle used as a heat engine. We consider specifically the case in which the working substance (WS) is a two-level system (TLS).
S Hamedani Raja +4 more
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