Quantum thermodynamics in strong coupling: heat transport and refrigeration

作者: Gil Katz , Ronnie Kosloff

DOI: 10.3390/E18050186

关键词: Cooling bathSpinsMaterials scienceSecond law of thermodynamicsThermal equilibriumHeat pumpRefrigerationQuantum thermodynamicsHeat currentCondensed matter physics

摘要: The performance characteristics of a heat rectifier and pump are studied in non Markovian framework. device is constructed from molecule connected to hot cold reservoir. baths modelled using the stochastic surrogate Hamiltonian method. by an asymmetric double-well potential. Each well semi-locally bath composed spins. dynamics driven combined system-bath Hamiltonian. temperature regulated secondary spin identical spins thermal equilibrium. A random swap operation exchange between primary baths. system various coupling strengths. In all cases average current always flows towards accordance second law thermodynamics. asymmetry double generates rectifying effect meaning that when left right exchanged follows direction. larger high frequency coupled bath. Adding external driving field can reverse transport Such refrigeration periodic resonance with difference two potential wells. minimal amplitude required overcome leak effect. strong regime cooling power non-monotonic coupling.

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