Implications of Coupling in Quantum Thermodynamic Machines
AbstractWe study coupled quantum systems as the working media of thermodynamic machines. Under a suitable phase-space transformation, the coupled systems can be expressed as a composition of independent subsystems. We find that for the coupled systems, the figures of merit, that is the efficiency for engine and the coefficient of performance for refrigerator, are bounded (both from above and from below) by the corresponding figures of merit of the independent subsystems. We also show that the optimum work extractable from a coupled system is upper bounded by the optimum work obtained from the uncoupled system, thereby showing that the quantum correlations do not help in optimal work extraction. Further, we study two explicit examples; coupled spin-
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Thomas, G.; Banik, M.; Ghosh, S. Implications of Coupling in Quantum Thermodynamic Machines. Entropy 2017, 19, 442.
Thomas G, Banik M, Ghosh S. Implications of Coupling in Quantum Thermodynamic Machines. Entropy. 2017; 19(9):442.Chicago/Turabian Style
Thomas, George; Banik, Manik; Ghosh, Sibasish. 2017. "Implications of Coupling in Quantum Thermodynamic Machines." Entropy 19, no. 9: 442.
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