On the operation of machines powered by quantum non-thermal baths
By Wolfgang Niedenzu, David Gelbwaser-Klimovsky, Abraham G. Kofman, Gershon Kurizki. 2015
138 citations recorded by the source corpus.
Diverse models of engines energised by quantum-coherent, hence non-thermal, baths allow the engine efficiency to transgress the standard thermodynamic Carnot bound. These transgressions call for an elucidation of the underlying mechanisms. Here we show that non-thermal baths may impart not only heat, but also mechanical work to a machine. The Carnot bound is inapplicable to such a hybrid machine. Intriguingly, it may exhibit dual action, concurrently as engine and refrigerator, with up to 100% efficiency. We conclude that even though a machine powered by a quantum bath may exhibit an unconventional performance, it still abides by the traditional principles of thermodynamics.
Subfields: Civil and Structural Engineering, Mechanical Engineering, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/3353091b36d0ca134f240b5d38e4409c6a0d535d
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In Statistical and Nonlinear Physics
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Citations in the corpus
- Introduction to Quantum Thermodynamics: History and Prospects (2018, background): “Nevertheless there is no violation of the II-law if accounting is done properly [107].”
- Quantum Fluctuation Theorems for Arbitrary Environments: Adiabatic and Nonadiabatic Entropy Production (2017, background): “Such environments induce an interesting phenomenology that goes beyond the thermodynamics of thermal equilibrium reservoirs, such as heat engines that outperform Carnot efficiency [46] and may exhibit new regimes of operation [45, 47] or tighter bounds on Landauer’s principle [48, 49].”
- Squeezed Thermal Reservoirs as a Resource for a Nanomechanical Engine beyond the Carnot Limit (2017, background): “Competing notions of heat have been employed, which lead to alternative definitions of the engine efficiency [22,37].”