Spinodal instability growth in new stochastic approaches

Abstract : Are spinodal instabilities the leading mechanism in the fragmentation of a fermionic system? Numerous experimental indications suggest such a scenario and stimulated much effort in giving a suitable description, without being finalised in a dedicated transport model. On the one hand, the bulk character of spinodal behaviour requires an accurate treatment of the one-body dynamics, in presence of mechanical instabilities. On the other hand, pure mean-field implementations do not apply to situations where instabilities, bifurcations and chaos are present. The evolution of instabilities should be treated in a large-amplitude framework requiring fluctuations of Langevin type. We present new stochastic approaches constructed by requiring a thorough description of the mean-field response in presence of instabilities. Their particular relevance is an improved description of the spinodal fragmentation mechanism at the threshold, where the instability growth is frustrated by the mean-field resilience.
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Communication dans un congrès
1st International Workshop on Multi facets of EoS and Clustering (IWM-EC), May 2014, Catania, Italy. 2015, 〈10.1051/epjconf/20158800003〉
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http://hal.in2p3.fr/in2p3-01089975
Contributeur : Sophie Heurteau <>
Soumis le : mardi 16 décembre 2014 - 14:59:03
Dernière modification le : jeudi 14 février 2019 - 14:57:45

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P. Napolitani, M. Colonna, V. De La Mota. Spinodal instability growth in new stochastic approaches. 1st International Workshop on Multi facets of EoS and Clustering (IWM-EC), May 2014, Catania, Italy. 2015, 〈10.1051/epjconf/20158800003〉. 〈in2p3-01089975〉

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