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Birmpa, P; Dirr, N; Tsagkarogiannis, D (2017)
Publisher: Springer Verlag
Journal: Journal of Statistical Physics
Languages: English
Types: Article
Subjects: QA, 82C, 60F10, 60G, Statistical and Nonlinear Physics, Mathematical Physics, Mathematics - Probability
We study the most probable way an interface moves on a macroscopic scale from an initial to a final position within a fixed time in the context of large deviations for a stochastic microscopic lattice system of Ising spins with Kac interaction evolving in time according to Glauber (non-conservative) dynamics. Such interfaces separate two stable phases of a ferromagnetic system and in the macroscopic scale are represented by sharp transitions. We derive quantitative estimates for the upper and the lower bound of the cost functional that penalizes all possible deviations and obtain explicit error terms which are valid also in the macroscopic scale. Furthermore, using the result of a companion paper about the minimizers of this cost functional for the macroscopic motion of the interface in a fixed time, we prove that the probability of such events can concentrate on nucleations should the transition happen fast enough.

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