Density matrix renormalization group approach to two-fluid open many-fermion systems
Nuclear Theory
2009-01-22 v1
Abstract
We have extended the density matrix renormalization group (DMRG) approach to two-fluid open many-fermion systems governed by complex-symmetric Hamiltonians. The applications are carried out for three- and four-nucleon (proton-neutron) systems within the Gamow Shell Model (GSM) in the complex-energy plane. We study necessary and sufficient conditions for the GSM+DMRG method to yield the correct ground state eigenvalue and discuss different truncation schemes within DMRG. The proposed approach will enable configuration interaction studies of weakly-bound and unbound strongly interacting complex systems which, because of a prohibitively large size of Fock space, cannot be treated by means of the direct diagonalization.
Cite
@article{arxiv.0810.0784,
title = {Density matrix renormalization group approach to two-fluid open many-fermion systems},
author = {J. Rotureau and N. Michel and W. Nazarewicz and M. Ploszajczak and J. Dukelsky},
journal= {arXiv preprint arXiv:0810.0784},
year = {2009}
}
Comments
13 pages, 15 figures