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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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http://hal.in2p3.fr/in2p3-01089975
Contributor : Sophie Heurteau <>
Submitted on : Tuesday, December 16, 2014 - 2:59:03 PM
Last modification on : Saturday, October 3, 2020 - 3:54:48 AM

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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. ⟨10.1051/epjconf/20158800003⟩. ⟨in2p3-01089975⟩

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