Optical conductivity of the half-filled hubbard chain
Phys Rev Lett 85:18 (2000) 3910-3913
Abstract:
We combine well-controlled analytical and numerical methods to determine the optical conductivity of the one-dimensional Mott-Hubbard insulator at zero temperature. A dynamical density-matrix renormalization group method provides the entire absorption spectrum for all but very small coupling strengths. In this limit we calculate the conductivity analytically using exact field-theoretical methods. Above the Lieb-Wu gap the conductivity exhibits a characteristic square-root increase. For small to moderate interactions, a sharp maximum occurs just above the gap. For larger interactions, another weak feature becomes visible around the middle of the absorption band.Exact solution of a partially asymmetric exclusion model using a deformed oscillator algebra
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL 33:12 (2000) 2313-2332
Fate of spinons in spontaneously dimerized spin-1/2 ladders
PHYSICAL REVIEW B 61:13 (2000) 8871-8877
Numerical method for detecting incommensurate correlations in the Heisenberg zigzag ladder
PHYSICAL REVIEW B 62:5 (2000) 3259-3263
Thermodynamics and excitations of the one-dimensional Hubbard model
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 331:5 (2000) 197-281