Density Matrix Renormalization Group Approach to Two-Fluid Open Many-Fermion Systems

Rotureau, J.; Michel, N.; Nazarewicz, Witold; Ploszajczak, M.; Dukelsky, J.

doi:10.1103/PhysRevC.79.014304

Title: Density Matrix Renormalization Group Approach to Two-Fluid Open Many-Fermion Systems

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.79.014304· OSTI ID:963685

Rotureau, J. ^[1]; Michel, N. ^[2]; Nazarewicz, Witold ^[3]; Ploszajczak, M. ^[4]; Dukelsky, J. ^[5]

University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
Kyoto University, Japan
ORNL
Grand Accelerateur National d'Ions Lourds (GANIL)
Instituto de Estructura de la Materia, CSIC, Madrid, Spain

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.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: DE-AC05-00OR22725

OSTI ID:: 963685

Journal Information:: Physical Review C, Vol. 79, Issue 1

Country of Publication:: United States

Language:: English

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