@article{ISI:000276248700068,
 abstract = {A modified density matrix renormalization group (DMRG) algorithm is
applied to the zigzag spin-1/2 chain with frustrated antiferromagnetic
exchange J(1) and J(2) between first and second neighbors. The modified
algorithm yields accurate results up to J(2)/J(1) approximate to 4 for
the magnetic gap Delta to the lowest triplet state, the amplitude B of
the bond order wave phase, the wavelength lambda of the spiral phase,
and the spin correlation length xi. The J(2)/J(1) dependences of Delta,
B, lambda, and xi provide multiple comparisons to field theories of the
zigzag chain. The twist angle of the spiral phase and the spin structure
factor yield additional comparisons between DMRG and field theory.
Attention is given to the numerical accuracy required to obtain
exponentially small gaps or exponentially long correlations near a
quantum phase transition.},
 article-number = {104406},
 author = {Kumar, Manoranjan and Soos, Zoltan G. and Sen, Diptiman and Ramasesha,
S.},
 doi = {10.1103/PhysRevB.81.104406},
 issn = {1098-0121},
 journal = {PHYSICAL REVIEW B},
 month = {MAR},
 number = {10},
 orcid-numbers = {/0000-0002-7624-8155},
 times-cited = {26},
 title = {Modified density matrix renormalization group algorithm for the zigzag
spin-1/2 chain with frustrated antiferromagnetic exchange: Comparison
with field theory at large J(2)/J(1)},
 unique-id = {ISI:000276248700068},
 volume = {81},
 year = {2010}
}