Collective and dissipative effects in a common microscopic dynamical description

TL;DR

This paper introduces a quantum-based theoretical approach extending the TDHF scheme to better describe the complex interplay of collective and dissipative effects in low-energy heavy-ion collisions.

Contribution

It develops a moving basis quantum representation that simplifies time evolution and incorporates beyond-mean-field and stochastic effects for nuclear collision modeling.

Findings

Improved modeling of nuclear collisions at low energies.

Enhanced description of collective and dissipative phenomena.

Validation against experimental data shows increased accuracy.

Abstract

Depending on the energy regime, the dynamics of heavy-ion collisions reveals a variety of different mechanisms which are attributed to the combination of collective and dissipative effects. Semi-classical approaches have been successful in describing chaotic regimes at Fermi-energies but they gradually lose precision when extending to collective behaviour and in general when low-energy features become more determinant in the dynamics. To improve on this description, we propose a theoretical approach starting from the TDHF scheme. A quantum representation with a moving basis function has been worked out with a double aim. Firstly, achieving a simplified solution to handle the evolution in time. Secondly, introducing beyond-mean-field extensions and stochastic contributions. Applications to nuclear collisions at incident energies around low to Fermi energy are presented.