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- W4225393512 abstract "We study the performance of quantum Stirling machines based on two Heisenberg-coupled spins as the working system near quantum critical point (QCP). During the heat cycle, the spins perform either as a heat engine or a refrigerator, with changing magnetic field to the critical point. At the QCP, the efficiency of the engine and the coefficient of performance of the refrigerator attain the corresponding values of their Carnot counterparts, along with maximum work output. We analyze how such enhancement can be attributed to the nonanalytic behaviour of spin-spin correlation and the entanglement near the QCP. Further, we explore how two spins perform as a thermal machine in presence of a third spin, when all the three spins are in thermodynamic equilibrium and exhibit quantum Stirling cycle." @default.
- W4225393512 created "2022-05-05" @default.
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- W4225393512 date "2022-08-01" @default.
- W4225393512 modified "2023-10-06" @default.
- W4225393512 title "Performance of Heisenberg-coupled spins as quantum Stirling heat machine near quantum critical point" @default.
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- W4225393512 doi "https://doi.org/10.1016/j.physleta.2022.128180" @default.
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