# Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments

Evstigneev M (2008) *PHYSICAL REVIEW E* 78(1).

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The dynamics of a number of experimental systems can be described as thermally activated escape out of a metastable state over a potential barrier, whose height is being constantly reduced in time by an increasing external force. In such systems, one can distinguish two loading regimes: for slow loading, the distribution of the force values at which escape occurs is a monotonically decreasing function, while for fast loading, the escape-force distribution has a maximum at some nonzero force value. In this work, an approximate relation between the most probable escape force and the first two moments thereof is derived for fast loading, and the expression for the first two force moments vs loading rate is obtained for slow loading. Then, for a special but physically well-motivated functional form of the escape rate, the most probable escape force is found analytically as a function of the loading rate. The high accuracy of these expressions is confirmed by comparing them with numerical results for realistic parameter values.

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Evstigneev M. Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments.

*PHYSICAL REVIEW E*. 2008;78(1).Evstigneev, M. (2008). Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments.

*PHYSICAL REVIEW E*,*78*(1). doi:10.1103/PhysRevE.78.011118Evstigneev, M. (2008). Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments.

*PHYSICAL REVIEW E*78.Evstigneev, M., 2008. Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments.

*PHYSICAL REVIEW E*, 78(1). M. Evstigneev, “Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments”,

*PHYSICAL REVIEW E*, vol. 78, 2008. Evstigneev, M.: Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments. PHYSICAL REVIEW E. 78, (2008).

Evstigneev, Mykhaylo. “Statistics of forced thermally activated escape events out of a metastable state: Most probable escape force and escape-force moments”.

*PHYSICAL REVIEW E*78.1 (2008).
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