Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in...

Area of Science:

• Nuclear Physics
• Quantum Many-Body Dynamics
• Quantum Dissipation

Background:

• Energy dissipation is crucial for quantum many-body systems reaching equilibrium.
• The dynamics of energy transfer from collective to single-particle motion in closed quantum systems are not fully understood.
• Investigating these processes is key to comprehending quantum system evolution.

Purpose of the Study:

• To experimentally investigate energy dissipative phenomena and equilibration dynamics.
• To explore deep-inelastic and fusion-fission outcomes in the ^{58}Ni+^{60}Ni reaction.
• To compare experimental results with theoretical models.

Main Methods:

• Experimental investigation of the ^{58}Ni+^{60}Ni nuclear reaction.
• Utilizing time-dependent Hartree-Fock (TDHF) calculations.
• Employing time-dependent random phase approximation (TDRPA) calculations.

Main Results:

• Experimental outcomes showed excellent quantitative agreement with theoretical predictions.
• TDHF and TDRPA models, incorporating one-body dissipation and fluctuations, accurately described the reaction dynamics.
• The study validated the use of microscopic models for analyzing low-energy heavy ion collisions.

Conclusions:

• Microscopic models incorporating one-body dissipation and fluctuations are effective tools for studying quantum many-body dynamics.
• These models provide a potential pathway for exploring energy dissipation in low-energy heavy ion collisions.
• The findings advance the understanding of equilibration processes in quantum systems.