Entropy production and fluctuations in a Maxwell's refrigerator with squeezing

Abstract

Clarifying the impact of quantumness in the operation and properties of thermal machines represents a major challenge. Here we envisage a toy model acting either as an information-driven fridge or as heat-powered information eraser in which coherences can be naturally introduced in by means of squeezed thermal reservoirs. We study the validity of the transient entropy production fluctuation theorem in the model with and without squeezing as well as its decomposition into adiabatic and non-adiabatic contributions. Squeezing modifies fluctuations and introduces extra mechanisms of entropy exchange. This leads to enhancements in the cooling performance of the refrigerator, and to overcoming Landauer's bound in the setup.

10 pages, 2 figures; v2: small corrections and improvements

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• Exact solution of time-dependent Lindblad equations with closed algebras
• Landauer's erasure principle in a squeezed thermal memory
• Detecting nonclassical correlations in levitated cavity optomechanics
• Quantum thermometry in a squeezed thermal bath
• Stochastic Floquet quantum heat engines and stochastic efficiencies
• Counting statistics of energy transport across squeezed thermal reservoirs
• Quantum thermodynamics under continuous monitoring: a general framework