Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 130, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3132747
Keywords
free energy; nonequilibrium thermodynamics; statistical mechanics
Funding
- NSF [CHE0556268]
- FQRNT
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The connection between work and changes in the Hamiltonian for a system with a time-dependent Hamiltonian has recently been called into question, casting doubt on the usefulness of the Jarzynski equality for calculating free energy changes. In this paper, we discuss the relationship between two possible definitions of free energy and show how some recent disagreements regarding the applicability of the Jarzynski equality are the result of different authors' using different definitions of free energy. Finally, in light of the recently raised doubts, we explicitly demonstrate that it is indeed possible to obtain physically relevant free energy profiles from molecular pulling experiments by using the Jarzynski equality and the results of Hummer and Szabo.
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