Matches in SemOpenAlex for { <https://semopenalex.org/work/W2977751012> ?p ?o ?g. }
- W2977751012 abstract "Abstract Lasers, photovoltaics, and thermoelectrically-pumped light emitting diodes are thermodynamic machines which use excitons (electron-hole pairs) as the working medium. The heat transfers in such devices are highly irreversible, leading to low efficiencies. Here we predict that reversible heat transfers between a quantum-dot exciton and its phonon environment can be induced by laser pulses. We calculate the heat transfer when a quantum-dot exciton is driven by a chirped laser pulse. The reversibility of this heat transfer is quantified by the efficiency of a heat engine in which it forms the hot stroke, which we predict to reach 95% of the Carnot limit. This performance is achieved by using the time-dependent laser-dressing of the exciton to control the heat current and exciton temperature. We conclude that reversible heat transfers can be achieved in excitonic thermal machines, allowing substantial improvements in their efficiency." @default.
- W2977751012 created "2019-10-10" @default.
- W2977751012 creator A5006494111 @default.
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- W2977751012 date "2019-10-03" @default.
- W2977751012 modified "2023-10-08" @default.
- W2977751012 title "Quantum control of excitons for reversible heat transfer" @default.
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- W2977751012 doi "https://doi.org/10.1038/s42005-019-0215-8" @default.
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