S-matrix spin and parity decoherence and damping of coherent nuclear rotation: quantum chaos in dissipative heavy-ion collisions?

Abstract

We extend the statistical reaction with memory approach to study off-diagonal spin and parity S-matrix energy autocorrelation in dissipative heavy-ion collisions. It is suggested that S-matrix spin and parity decoherence results in (i) damping of the coherent nuclear rotation and (ii) is a manifestation of quantum chaos in dissipative heavy-ion collisions.

Fourier analysis of nonself-averaging quasiperiodic oscillations in the excitation functions of dissipative heavy-ion collisions: quantum chaos in dissipative heavy-ion collisions?

“…Spin and parity decoherence, damping of the coherent nuclear rotation and quantum chaos are time-dependent phenomena [5]. Accordingly, it seems unlikely [5] that these effects can be unambiguously identified from the analysis of energy-averaged, i.e.…”

“…It was suggested in [5] that spin and parity decoherence, damping of the coherent nuclear rotation and quantum chaos could be identified from the analysis of excitation function oscillations in DHIC. This effect was first discovered and reported in [34] and further measurements [32,33,[35][36][37][38][39][40][41][42][43][44][45] have confirmed the universality of this phenomenon.…”

“…Recently (see [5] and references therein) we have made further developments of the suggestion of [1] by taking into account S-matrix total spin (J) and parity (π) correlations in DHIC. These correlations should be taken into account when the intermediate system does not necessarily attain a complete statistical equilibrium (uniform occupation of the available phase-space) before its decay.…”

“…These correlations should be taken into account when the intermediate system does not necessarily attain a complete statistical equilibrium (uniform occupation of the available phase-space) before its decay. It has been suggested [5] that S-matrix spin and parity decoherence causes the damping of the coherent nuclear rotation and quantum chaos, i.e. statistical relaxation in the discrete spectrum on finite time intervals (see, for example, [6,7] and references therein).…”

“…Accordingly, it seems unlikely [5] that these effects can be unambiguously identified from the analysis of energy-averaged, i.e. time-integrated observables.…”