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# Search results

15 records were found.

## Tomonaga-Luttinger-liquid criticality: numerical entanglement entropy approach

Comment: 5 pages, 5 figures, 3 tables

## Phase diagram of the one-dimensional half-filled extended Hubbard model

Comment: 4 pages, 5 figures

## Anomalous behaviors of the charge and spin degrees of freedom in the CuO double chains of PrBa$_2$Cu$_4$O$_8$

Comment: REVTEX 4, 10 pages, 9 figures; submitted to PRB

## Density-matrix renormalisation group approach to quantum impurity problems

Comment: 16 pages, 6 figures, submitted to Journal of Physics: Condensed Matter

## Dynamical Density-Matrix Renormalization Group for the Mott--Hubbard insulator in high dimensions

Comment: 21 pages, 7 figures, submitted to Journal of Physics: Condensed Matter

## Tomonaga-Luttinger parameters for doped Mott insulators

The Tomonaga--Luttinger parameter $K_{\rho}$ determines the critical behavior in quasi one-dimensional correlated electron systems, e.g., the exponent $\alpha$ for the density of states near the Fermi energy. We use the numerical density-matrix renormalization group method to calculate $K_{\rho}$ from the slope of the density-density correlation function in momentum space at zero wave vector. We check the accuracy of our new approach against exact results for the Hubbard and XXZ Heisenberg models. We determine $K_{\rho}$ in the phase diagram of the extended Hubbard model at quarter filling, $n_{\rm c}=1/2$, and confirm the bosonization results $K_{\rho}=n_{\rm c}^2=1/4$ on the critical line and $K_{\rho}^{\rm CDW}=n_{\rm c}^2/2=1/8$ at infinitesimal doping of the charge-density-wave (CDW) insulator for all interaction strengths. The ...

## Spectral Density of the Two-Impurity Anderson Model

Comment: 18 pages, 6 figures, submitted to J. Phys.:Condens. Matter

## Tomonaga-Luttinger parameters and spin excitations in the dimerized extended Hubbard model

Comment: 10 pages, 9 figures, to be submitted to PRB

## Metal-insulator transition of the Kagome lattice fermions at 1/3 filling

Comment: 4 pages, 7 figures

## Application of the Density Matrix Renormalization Group in momentum space

Comment: 15 pages, 11 eps figures, revtex 4