Related Experiment Video
Updated: Jun 18, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Calculation of semiclassical free energy differences along nonequilibrium classical trajectories
1Department of Chemistry, Technische Universität of München, Lichtenbergstrasse 4, D-85747 Garching, Germany. gelin@ch.tum.de
Abstract:
We have derived several relations, which allow the evaluation of the system free energy changes in the leading order in variant Planck's over 2pi(2) along classically generated trajectories. The results are formulated in terms of purely classical Hamiltonians and trajectories, so that semiclassical partition functions can be computed, e.g., via classical molecular dynamics simulations. The Hamiltonians, however, contain additional potential-energy terms, which are proportional to variant Planck's over 2pi(2) and are temperature-dependent. We discuss the influence of quantum interference on the nonequilibrium work and problems with unambiguous definition of the semiclassical work operator.
More Related Videos
Related Concept Videos
Calculating Standard Free Energy Changes
Gibbs Free Energy
Free Energy Changes for Nonstandard States
Free Energy and Equilibrium
The reaction quotient, Q, is a convenient measure of the status of an...
Free Energy and Equilibrium
Recall that Q is the numerical value of the mass action expression...
Gibbs Free Energy and Thermodynamic Favorability

