Ivanchenko E A
Institute for Theoretical Physics, National Science Center "Institute of Physics and Technology," 1, Akademicheskaya street, 61108 Kharkov, Ukraine.
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Sep;92(3):032124. doi: 10.1103/PhysRevE.92.032124. Epub 2015 Sep 18.
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 1, (iii) at the positive temperatures of heat baths antiferromagnetic interaction raises efficiency threefold in comparison with uncoupled particles.
考虑了具有自旋3/2的耦合粒子（四元体）在恒定磁场中的性质，将其作为热机量子奥托循环中的工作物质。结果表明，该系统作为热能到功的转换器，（i）在热浴的负绝对温度下效率为1，（ii）在相反符号的温度下效率接近1，（iii）在热浴的正温度下，反铁磁相互作用使效率比未耦合粒子提高了三倍。
