Showing papers by "Herbert B. Callen published in 1952"

On a Theorem of Irreversible Thermodynamics

Abstract: A relation is obtained between the parameter describing the irreversible response of a driven dissipative system and the spontaneous fluctuations of the thermodynamic extensive parameters of the system in equilibrium. The development given in this paper extends the theorem, previously proven in the statistical mechanical domain, to the macroscopic thermodynamic domain.

Statistical Mechanics of Irreversibility

Abstract: The fluctuation-dissipation theorem relating spontaneous equilibrium fluctuations to the conductance in a dissipative thermodynamic system is extended to the case of several variables, using a quantum statistical analysis. The conductance matrix is shown to be subject to certain symmetry relations, providing a generalization of the Onsager reciprocity theorem. The susceptance matrix is also shown to be subject to similar symmetries. The symmetries apply to all frequency components, and hence to arbitrary transient processes.