Coupled-Channels Approach for Dissipative Quantum Dynamics in Near-Barrier Collisions

Details Coupled-Channels Approach for Dissipative Quantum Dynamics in Near-Barrier Collisions Coupled-Channels Approach for Dissipative Quantum Dynamics in Near-Barrier Collisions

2008-11-11

arxiv.org/abs/0811.1611v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 4 figures, Invited talk by A. Diaz-Torres at the FUSION08 Conference, Chicago, September 22-26, 2008, To appear in AI

Scientific paper

10.1063/1.3108859

A novel quantum dynamical model based on the dissipative quantum dynamics of open quantum systems is presented. It allows the treatment of both deep-inelastic processes and quantum tunneling (fusion) within a fully quantum mechanical coupled-channels approach. Model calculations show the transition from pure state (coherent) to mixed state (decoherent and dissipative) dynamics during a near-barrier nuclear collision. Energy dissipation, due to irreversible decay of giant-dipole excitations of the interacting nuclei, results in hindrance of quantum tunneling.

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