Center-of-mass motion and cross-channel coupling in time-dependent Hartree-Fock theory

TL;DR

This paper discusses the impact of center-of-mass motion and cross-channel coupling in time-dependent Hartree-Fock simulations of heavy-ion collisions, finding limited effects on initial dynamics but potential issues in long-term evolution.

Contribution

It provides an analysis of how these effects influence TDHF simulations, highlighting their limited impact on entrance channel dynamics and potential reliability concerns over long times.

Findings

Center-of-mass motion has minimal effect on initial collision dynamics.

Cross-channel coupling does not significantly alter entrance channel behavior.

Long-time evolution in TDHF may be less reliable due to these effects.

Abstract

We provide a discussion of issues related to the center-of-mass motion and cross-channel coupling in applications of the time-dependent Hartree-Fock (TDHF) theory to heavy-ion collisions. We find that the entrance channel dynamics of a heavy-ion collision as described by TDHF does not seem to be significantly influenced by these effects, whereas the long-time evolution may be less reliable.