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- W3184320293 abstract "A geometry-based mechanism for generating steady-state internal circulation of local thermal currents is demonstrated by harmonically coupled quantum oscillators formulated by the Redfield quantum master equation (RQME) and the Bose-Hubbard model (BHM) of phonons formulated by the Lindblad quantum master equation (LQME) using the simple multipath geometry of a triangle. Driven by two reservoirs at different temperatures, both systems can exhibit an atypical local thermal current flowing against the total current. However, the total thermal current behaves normally. While the RQME of harmonically coupled quantum oscillators allows an analytical solution, the LQME of the interacting BHM can be solved numerically. The emergence of the geometry-based circulation in both systems demonstrates the ubiquity and robustness of the mechanism. In the high-temperature limit, the results agree with the classical results, confirming the generality of the geometric-based circulation across the quantum and classical boundary. The geometry-based circulation also emerges from a quantum Langevin equation calculation. Possible experimental implications and applications are briefly discussed." @default.
- W3184320293 created "2021-08-02" @default.
- W3184320293 creator A5009658349 @default.
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- W3184320293 date "2022-06-09" @default.
- W3184320293 modified "2023-09-25" @default.
- W3184320293 title "Geometry-based circulation of local thermal current in quantum harmonic and Bose-Hubbard systems" @default.
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- W3184320293 doi "https://doi.org/10.1103/physreve.105.064111" @default.
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