New methods to find accurate reaction coordinates by path sampling

Gregg T. Beckham, Baron Peters

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Complex, high-dimensional systems are often characterized by dynamical bottlenecks, or rare events, that determine the rate of evolution of a given system. As the transition states through the dynamical bottlenecks are often difficult to capture experimentally, theory and computation are useful tools to elucidate transition states. This review describes a set of computational methods that enable the rigorous determination of mechanisms, free energy barriers, and rate constants for activated processes in complex, high-dimensional systems. The transition path sampling method for sampling reactive pathways and a subsequent methodological development, aimless shooting, are reviewed. Likelihood maximization, which is a method to extract the reaction coordinate of an activated process from path sampling data, is discussed in detail. In addition, the equilibrium path sampling approach and the earlier BOLAS approach for determining free energy barriers are examined. These techniques offer a means to access kinetically meaningful results from molecular simulation of activated processes in complex systems.

Original languageEnglish (US)
Title of host publicationComputational Modeling in Lignocellulosic Biofuel Production
PublisherAmerican Chemical Society
Number of pages34
ISBN (Print)9780841225718
StatePublished - Dec 14 2010
Externally publishedYes

Publication series

NameACS Symposium Series
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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