Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density matrix renormalization group approach to two-fluid open
  many-fermion systems   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.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat