A new on-shell 3-to-3 collision integral for identical fermions is derived, and model calculations find it reduces nuclear matter relaxation times by up to a factor 3 versus two-body collisions alone.
Truncation scheme of time-dependent density-matrix approach
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abstract
A truncation scheme of the Bogoliubov-Born-Green-Kirkwood-Yvon hierarchy for reduced density matrices, where a three-body density matrix is approximated by the antisymmetrized products of two-body density matrices, is proposed. This truncation scheme is tested for three model hamiltonians. It is shown that the obtained results are in good agreement with the exact solutions.
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Quantum correlation dynamics and in-medium 3$\leftrightarrow$3 collisions of fermions
A new on-shell 3-to-3 collision integral for identical fermions is derived, and model calculations find it reduces nuclear matter relaxation times by up to a factor 3 versus two-body collisions alone.