Actions for Near-equilibrium measurements of nonequilibrium free energy [electronic resource].

Email RIS file
Bookmark
Report an Issue

Near-equilibrium measurements of nonequilibrium free energy [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
6 : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
A central endeavor of thermodynamics is the measurement of free energy changes. Regrettably, although we can measure the free energy of a system in thermodynamic equilibrium, typically all we can say about the free energy of a nonequilibrium ensemble is that it is larger than that of the same system at equilibrium. Herein, we derive a formally exact expression for the probability distribution of a driven system, which involves path ensemble averages of the work over trajectories of the time-reversed system. From this we find a simple near-equilibrium approximation for the free energy in terms of an excess mean time-reversed work, which can be experimentally measured on real systems. With analysis and computer simulation, we demonstrate the accuracy of our approximations for several simple models.
Report Numbers
E 1.99:lbnl-5669e
lbnl-5669e
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
04/09/2012.
"lbnl-5669e"
Physical Review Letters 108 15 FT
Crooks, Gavin.
Funding Information
DE-AC02-05CH11231
View MARC record | catkey: 23504527