Complex coupled-cluster approach to an ab-initio description of open quantum systems

2006/10/18 by G. Hagen, D. J. Dean, M. Hjorth-Jensen +1 · 1 citation
Physics and Astronomy · #nucl-th

paper · pdf · doi:10.1016/j.physletb.2007.07.072

published as Phys.Lett.B656:169-173,2007 · 4 pages, revtex4

arxiv created 2006/10/18 · arxiv updated 2009/12/01

Abstract

We develop ab-initio coupled-cluster theory to describe resonant and weakly bound states along the neutron drip line. We compute the ground states of the helium chain 3-10He within coupled-cluster theory in singles and doubles (CCSD) approximation. We employ a spherical Gamow-Hartree-Fock basis generated from the low-momentum N3LO nucleon-nucleon interaction. This basis treats bound, resonant, and continuum states on equal footing, and is therefore optimal for the description of properties of drip line nuclei where continuum features play an essential role. Within this formalism, we present an ab-initio calculation of energies and decay widths of unstable nuclei starting from realistic interactions.

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