Observation time scale, free-energy landscapes, and molecular symmetry.

نویسندگان

  • David J Wales
  • Peter Salamon
چکیده

When structures that interconvert on a given time scale are lumped together, the corresponding free-energy surface becomes a function of the observation time. This view is equivalent to grouping structures that are connected by free-energy barriers below a certain threshold. We illustrate this time dependence for some benchmark systems, namely atomic clusters and alanine dipeptide, highlighting the connections to broken ergodicity, local equilibrium, and "feasible" symmetry operations of the molecular Hamiltonian.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 111 2  شماره 

صفحات  -

تاریخ انتشار 2014