Steady-state thermodynamics of non-interacting transport beyond weak coupling
We investigate the thermodynamics of simple (non-interacting) transport models beyond the scope of weak coupling. For a single fermionic or bosonic level -tunnel-coupled to two reservoirs-exact expressions for the stationary matter and energy current are derived from the solutions of the Heisenberg...
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| Veröffentlicht in: | Europhysics letters 2015-06, Vol.110 (6), p.67003-p1-67003-p6 |
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| container_end_page | p1-67003-p6 |
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| container_title | Europhysics letters |
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| creator | Topp, Gabriel E. Brandes, Tobias Schaller, Gernot |
| description | We investigate the thermodynamics of simple (non-interacting) transport models beyond the scope of weak coupling. For a single fermionic or bosonic level -tunnel-coupled to two reservoirs-exact expressions for the stationary matter and energy current are derived from the solutions of the Heisenberg equations of motion. The positivity of the steady-state entropy production rate is demonstrated explicitly. Finally, for a configuration in which particles are pumped upwards in chemical potential by a downward temperature gradient, we demonstrate that the thermodynamic efficiency of this process decreases when the coupling strength between system and reservoirs is increased, as a direct consequence of the loss of a tight coupling between energy and matter currents. |
| doi_str_mv | 10.1209/0295-5075/110/67003 |
| format | Article |
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| source | IOP Publishing Journals |
| subjects | 05.30.Fk 05.30.Jp 72.10.Bg Chemical potential Coupling Entropy Equations of motion Joining Mathematical models Reservoirs Steady state Temperature gradient Thermodynamic efficiency Thermodynamics Transport |
| title | Steady-state thermodynamics of non-interacting transport beyond weak coupling |
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