关于相对论动体间的单纯热相互作用和Landsberg悖论

探讨了相对论热力学中所谓“动体温度”的物理意义.通过对相对运动物体间能量转移与热传递的分析,发现:如同传统热力学中那样,在相对论热力学的Planck-Einstein形式体系及Ott-Mφller形式体系中,动体温度可理解为“单纯热相互作用下热流的势”.然而由于对“功”的规定并不一致,相对论热力学中如何定义“单纯热相互作用”成了一个见仁见智的问题.相应地,导致了温度变换问题上的“升温说”和“降温说”等不同观点.实质上,它们只不过是用不同语言去描述同样的物理实际,因而是相容的.如果一贯地遵循某个形式体系,则动体间的“冷热关系”以及“单纯热相互作用”概念二者同时随参考系的选取而变.在此基础上对于Landsberg思想实验的分析表明,不存在逻辑悖论.

On Purely Thermal Interaction between Relativistic Moving Bodies and about Landsberg Paradox

The physical implication of the so called "temperature of a moving body" was investigated. On careful analyses of the transfer of energy and heat between two bodies in relative motion. the following results were obtained: Just as in traditionary thermodynamics, so either in Planck-Einstein or in Ott-Moller formulation of relativistic thermodynamics, the "temperature" of a moving body can be regarded as the "potential of heat flow under purely thermal interaction". However, for lack of agreement on the definition of the "work", within relativistic thermodynamics, the "purely thermal interaction" can be defined differently. This has led to various opinions in temperature transformation about a higher or lower temperature for a moving body. In substance, different formulation are des cribing in different forms the very same physical reality; so, they are compatible.When one and the same formulation is followed, both the "hot-cold relationship" between moving bodies and the concept of "purely thermal interaction" depend on the selection of frame of reference. On this basis, an analysis about Landsberg's thought experiment shows that there is not any logical contradition.