Slow cross-symmetry phase relaxation in complex collisions

TL;DR

This paper investigates slow phase relaxation and spin correlations in complex collisions, revealing effects like quasiperiodic energy dependence and coherent rotation in highly excited intermediate systems across various collision types.

Contribution

It introduces the concept of slow phase relaxation and analyzes its impact on cross section oscillations and quantum coherence in complex collision systems.

Findings

Identification of slow phase relaxation effects in heavy ion collisions

Observation of quasiperiodic energy dependence of cross sections

Evidence of coherent rotation and Schrödinger cat states in intermediate complexes

Abstract

We discuss the effect of slow phase relaxation and the spin off-diagonal $S$-matrix correlations on the cross section energy oscillations and the time evolution of the highly excited intermediate systems formed in complex collisions. Such deformed intermediate complexes with strongly overlapping resonances can be formed in heavy ion collisions, bimolecular chemical reactions and atomic cluster collisions. The effects of quasiperiodic energy dependence of the cross sections, coherent rotation of the hyperdeformed $\simeq (3:1)$ intermediate complex, Schr\"odinger cat states and quantum-classical transition are studied for $^{24}$Mg+$^{28}$Si heavy ion scattering.