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arXiv 1704.03071math-phgr-qchep-thmath.MP
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几何热力学度规的物理意义

On the physical significance of geometrothermodynamic metrics

Viridiana Pineda, Hernando Quevedo, Maria N. Quevedo, Alberto Sanchez, Edgar Valdes

摘要:

在几何热力学(GTD)中,为了研究平衡空间的几何性质,迄今为止已经提出了三种热力学度规。这些度量通过使用勒让德不变性的条件获得,并且一旦热力学势被指定为基本方程,就可以显式地计算。我们使用的相和平衡空间中剩余的同态不变性表明,GTD度量的组件可以被解释为一个新的热力学势的波动的二阶矩。这一结果建立了GTD和涨落理论之间的直接联系。通过这种方式,GTD的同态不变性允许我们引入新的热力学坐标和新的热力学势,它们不通过勒让德变换与基本热力学势相关。

英文摘要:

In geometrothermodynamics (GTD), to study the geometric properties of the equilibrium space three thermodynamic metrics have been proposed so far. These metrics are obtained by using the condition of Legendre invariance and can be computed explicitly once a thermodynamic potential is specified as the fundamental equation. We use the remaining diffeomorphism invariance in the phase and equilibrium spaces to show that the components of the GTD-metrics can be interpreted as the second moment of the fluctuation of a new thermodynamic potential. This result establishes a direct connection between GTD and fluctuation theory. In this way, the diffeomorphism invariance of GTD allows us to introduce new thermodynamic coordinates and new thermodynamic potentials, which are not related by means of Legendre transformations to the fundamental thermodynamic potentials.

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