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- W2911671567 abstract "This thesis is about the study of the metastability of the Blume-Capel model. This model, introduced in 1966, is a nearest-neighbor spin system where the single spin variable takes three possible values +1, -1, 0. One can interpret it as a system ofparticles with spins. The value 0 of the spin corresponds to the absence of particle, whereas the values ± correspond to the presence of a particle with the respective spin. The thesis is divided in two parts. The first part is an article published in Journal of Statistical Physics with C. Landim. We prove the metastable behavior of the Blume-Capel model when the temperature decreases to 0 on a fixed size torus.The second part is dedicated to the generalization of these results to the case of a torus which size increases to +1 as the temperature decreases to 0. For this model, three metastable states -1, 0,+1 remain on a very large time scale, where -1, 0,+1 stand for the configuration where the torus is respectively filled with -1’s, 0’s and +1’s. We prove that starting from -1, the process visits 0 before reaching +1 with very high probability. We also caracterize the critical configurations and provide sharp estimates of the transition times." @default.
- W2911671567 created "2019-02-21" @default.
- W2911671567 creator A5042164400 @default.
- W2911671567 date "2018-06-29" @default.
- W2911671567 modified "2023-09-23" @default.
- W2911671567 title "Metastability of the Blume-Capel model" @default.
- W2911671567 hasPublicationYear "2018" @default.
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