2018/02/09 by Lei Li, Jian Zou, Hai Li +4
Chemistry · Engineering · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Chemistry #Coherence (philosophical gambling strategy) #Collision #Current (fluid) #Diagonal #Geometry #Heat current #Heat transfer #Mathematics #Mechanics #Phase (matter) #Physics #Quantum Electrodynamics and Casimir Effect #Quantum mechanics #Steady state (chemistry) #Thermal #Thermal Radiation and Cooling Technologies #Thermal reservoir #Thermodynamics #quant-ph
paper · pdf · doi:10.1103/physreve.97.022111
published as Physcal Review E 97, 022111 (2018)
openalex publication_date 2018/02/09 · arxiv created 2018/02/13 · arxiv updated 2018/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the heat transport between two nonthermal reservoirs based on a microscopic collision model. We consider a bipartite system consisting of two identical subsystems, and each subsystem interacts with its own local reservoir, which consists of a large collection of initially uncorrelated ancillas. Then a heat transport is formed between two reservoirs by a sequence of pairwise collisions (intersubsystem and subsystem-local reservoir). In this paper we consider two kinds of the reservoir's initial states: the thermal state and the state with coherence whose diagonal elements are the same as that of the thermal state and the off-diagonal elements are nonzero. In this way, we define the effective temperature of the reservoir with coherence according to its diagonal elements. We find that for two reservoirs having coherence the direction of the steady current of heat is different for different phase differences between the two initial states of two reservoirs, especially the heat can transfer from the "cold reservoir" to the "hot reservoir" in the steady regime for particular phase difference. In the limit of the effective temperature difference between the two reservoirs ΔT→0, for most of the phase differences, the steady heat current increases with the increase of effective temperature until it reaches the high effective temperature limit, while for the thermal state or particular phase difference the steady heat current decreases with the increase of temperature at high temperatures, and in this case the conductance can be obtained.