Quantum Otto cycle efficiency on coupled qudits
Copyright policy )Quantum Otto cycle efficiency on coupled qudits
Properties of the coupled particles with spin 3/2 (quartits) in a constant magnetic field, as a working substance in the quantum Otto cycle of the heat engine, are considered. It is shown that this system as a converter of heat energy in work (i) shows the efficiency 1 at the negative absolute temperatures of heat baths, (ii) at the temperatures of the opposite sign the efficiency approaches to 1, (iii) at the positive temperatures of heat baths antiferromagnetic interaction raises efficiency threefold in comparison with uncoupled particles.
19 pages, 11 figures, added references
Quantum Physics, Statistical Mechanics (cond-mat.stat-mech), FOS: Physical sciences, Quantum Physics (quant-ph), Condensed Matter - Statistical Mechanics
Quantum Physics, Statistical Mechanics (cond-mat.stat-mech), FOS: Physical sciences, Quantum Physics (quant-ph), Condensed Matter - Statistical Mechanics
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