A DMRG STUDY OF THE Q-SYMMETRICAL HEISENBERG CHAIN

Authors
KAULKE M PESCHEL I
Citation
M. Kaulke et I. Peschel, A DMRG STUDY OF THE Q-SYMMETRICAL HEISENBERG CHAIN, The European Physical Journal. B: Condensed Matter Physics, 5(3), 1998, pp. 727-734
Citations number
41
Categorie Soggetti
Physics, Condensed Matter
Journal title
The European Physical Journal. B: Condensed Matter Physics → ACNP
ISSN journal
14346028
Volume
5
Issue
3
Year of publication
1998
Pages
727 - 734
Database
ISI
SICI code
1434-6028(1998)5:3<727:ADSOTQ>2.0.ZU;2-H
Abstract
The spin one-half Heisenberg chain with U-q[SU(2)] symmetry is studied via density-matrix renormalization. Ground-state energy and q-symmetr ic correlation functions are calculated for the non-Hermitian case q = exp(i pi(r+1)) with integer r. This gives bulk and surface exponents for (para)fermionic correlations in the related Ising and Potts models . The case of real q corresponding to a diffusion problem is treated a nalytically.