摘要
热力学的第二条法律被许多事实在古典世界上证明了。在量世界上有它的任何新性质吗？在这篇论文，我们为量热引擎(QHE ) 在 T.D Kieu 的模型计算熵的变化并且证明热力学的第二条法律的宽广有效性。量热引擎的熵也不在一个整个周期减少，这被显示出，也不在周期的任何一个舞台减少。热力学的第二条法律仍然控制这个 QHE 模型。而且尽管修改的量热引擎能够提取，更多工作，它的效率根本不改善。它不是在 T.D Kieu 的起始的模型的效率以外的任何一个，比可逆 Carnot 效率也不大。
The second law of thermodynamics has been proven by many facts in classical world. Is there any new property of it in quantum world？ In this paper, we calculate the change of entropy in T.D. Kieu＇s model for quantum heat engine （QHE） and prove the broad validity of the second law of thermodynamics. It is shown that the entropy of the quantum heat engine neither decreases in a whole cycle, nor decreases in either stage of the cycle. The second law of thermodynamics still holds in this QHE model. Moreover, although the modified quantum heat engine is capable of extracting more work, its efficiency does not improve at all. It is neither beyond the efficiency of T.D. Kieu＇s initial model,nor greater than the reversible Carnot efficiency.
基金
The project supported by National Natural Science Foundation of China under Grant No. 10404039
