Journal
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
Volume 34, Issue 19, Pages 4041-4052Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0305-4470/34/19/306
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High-dimensional energy landscapes of complex systems often exhibit a very complicated structure, with many local minima separated by a multitude of barriers of various heights. For the analysis of the dynamics on such landscapes, simplified models based on combining many microstates to form physically relevant macrostates are of great advantage. In particular, knowledge of the relative sizes of minimum and transition regions is crucial. As an example, we analyse transitions in low-energy regions belonging to a simple model of the crystalline compound MgF2. We find that the minimum regions, i.e. the states associated with only one particular minimum, extend to energies far above the saddle points, and we show that the size of the transition regions is small compared with the minimum regions.
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