Short Time Cycles of Purely Quantum Refrigerators
arXiv:1204.4059 · doi:10.1103/PhysRevE.85.051114
Abstract
Four stroke Otto refrigerator cycles with no classical analogue are studied. Extremely short cycle times with respect to the internal time scale of the working medium characterize these refrigerators. Therefore these cycles are termed sudden. The sudden cycles are characterized by the stable limit cycle which is the invariant of the global cycle propagator. During their operation the state of the working medium possesses significant coherence which is not erased in the equilibration segments due to the very short time allocated. This characteristic is reflected in a difference between the energy entropy and the Von Neumann entropy of the working medium. A classification scheme for sudden refrigerators is developed allowing simple approximations for the cooling power and coefficient of performance.
20 pages, 12 figures. Among the figures there are 6 figures which are double, namely with two parts, Top and Bottom
References in corpus (5)
Cited by in corpus (28)
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- Theory of Entropy Production in Quantum Many-Body Systems
- Classical emulation of quantum-coherent thermal machines
- Performance of quantum heat engines under the influence of long-range interactions
- Quantum Stirling heat engine with squeezed thermal reservoir
- The interplay between cycle geometry and performance of sudden refrigerators
- Advancing Quantum Otto Engine Performance via Additional Magnetic Field and Effective Negative Temperature
- Thermodynamics of Statistical Anyons
- Quantum Otto engines at relativistic energies