Bifurcations in Boltzmann-Langevin One Body dynamics for fermionic systems

TL;DR

This paper explores bifurcations in nuclear collision dynamics at Fermi energies using a new 3D Boltzmann-Langevin transport model, revealing fluctuations between compact and fragmented states in fermionic systems.

Contribution

It introduces a novel 3D Boltzmann-Langevin transport model for dissipative fermionic dynamics and demonstrates bifurcations in nuclear collision trajectories.

Findings

Fluctuations between compact and disintegrated nuclear shapes.

Bimodal distributions observed in fragmentation characteristics.

New insights into dissipative fermionic collision dynamics.

Abstract

We investigate the occurrence of bifurcations in the dynamical trajectories depicting central nuclear collisions at Fermi energies. The quantitative description of the reaction dynamics is obtained within a new transport model, based on the solution of the Boltzmann-Langevin equation in three dimensions, with a broad applicability for dissipative fermionic dynamics. Dilute systems formed in central collisions are shown to fluctuate between two energetically favourable mechanisms: reverting to a compact shape or rather disintegrating into several fragments. The latter result can be connected to the recent observation of bimodal distributions for quantities characterising fragmentation processes and may suggest new investigations.