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arXiv 1111.5056math-phgr-qcmath.MP
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几何热力学基础

Fundamentals of Geometrothermodynamics

Hernando Quevedo, Maria N. Quevedo

摘要:

我们提出了geometrothermodynamics的基本数学元素,这是一种形式主义,以不变的方式描述给定的热力学系统的热力学性质的几何结构。首先,为了不变量地表示热力学热力学第一定律和广义Legendre变换,我们定义相流形为具有接触结构的Legendre不变黎曼流形.平衡流形的定义是通过使用调和映射,其中包括规范的基本方程的热力学系统。准静态热力学过程对应于保持热力学热力学定律的平衡流形的测地线。我们详细地研究了理想气体和范德华气体的平衡流形,作为几何热力学应用的具体例子。

英文摘要:

We present the basic mathematical elements of geometrothermodynamics which is a formalism developed to describe in an invariant way the thermodynamic properties of a given thermodynamic system in terms of geometric structures. First, in order to represent the first law of thermodynamics and the general Legendre transformations in an invariant way, we define the phase manifold as a Legendre invariant Riemannian manifold with a contact structure. The equilibrium manifold is defined by using a harmonic map which includes the specification of the fundamental equation of the thermodynamic system. Quasi-static thermodynamic processes are shown to correspond to geodesics of the equilibrium manifold which preserve the laws of thermodynamics. We study in detail the equilibrium manifold of the ideal gas and the van der Waals gas as concrete examples of the application of geometrothermodynamics.

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