Reconstructing free-energy landscapes for nonequilibrium periodic potentials.
basic_science · Level V
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- Record sourced from PubMed, PMID 29776077.
- Also identified by DOI 10.1103/PhysRevE.97.032419.
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Abstract
We present a method for reconstructing the free-energy landscape of overdamped Brownian motion on a tilted periodic potential. Our approach exploits the periodicity of the system by using the k-space form of the Smoluchowski equation and we employ an iterative approach to determine the nonequilibrium tilt. We reconstruct landscapes for a number of example potentials to show the applicability of the method to both deep and shallow wells and near-to- and far-from-equilibrium regimes. The method converges logarithmically with the number of Fourier terms in the potential.