Cj Adkins Equilibrium Thermodynamics Solutions Manuall [BEST]
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In short, the potential free energy of the system when all particles are in their lowest energy state, makes some given transition, may be treated as a weighted sum of the already-performed transitions, analogous to a Monte-Carlo average.
Within the application of free energy defined above, and other related assumptions, Van Kampen (2007) has a class of Feynman paths energetically equivalent to the ensemble of all paths from x to x′ (see below). The validity of the equipartition theorem for the system is crucial in this context, and many path-dependent potential, non-equilibrium generalizations of equilibrium statistical mechanics have not taken the equipartition theorem seriously (e.g. Evans 1992, 2003; Van Kampen 2007).
Sometimes the path-ensemble method provides more insight than the average-based techniques. For example Penrose (2005) and Jarzynski (2007) used it to analyse the ergodic and irreversibility properties of macroscopic systems that are actually composed of a large collection of indivisible subsystems. This implies carrying out the calculations for the detailed theory of open systems (Hanggi and Straube 2008) on a system of subsystems while preserving the system's state space. Details are available in Grodzinski and Salamon (2012).
As noted throughout this thesis, free energy from the point of view of such an ensemble is directly related to the probability of observing a specific transition v, in the set of possible transition corresponding to the reaction k d2c66b5586