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Quantum Corner-Transfer Matrix DMRG
Erik Bartel, Andreas Schadschneider
We propose a new method for the calculation of thermodynamic properties of one-dimensional quantum systems by combining the TMRG approach with the corner transfer-matrix method. Th…
Triplet superconductivity in a 1D itinerant electron system with transverse spin anisotropy
C. Dziurzik, G. I. Japaridze, A. Schadschneider +2
In this paper we study the ground state phase diagram of a one-dimensional t-J-U model away from half-filling. In the large-bandwidth limit and for ferromagnetic exchange with easy…
Exact ground states of quantum spin-2 models on the hexagonal lattice
Marc Andre Ahrens, Andreas Schadschneider, Johannes Zittartz
We construct exact non-trivial ground states of spin-2 quantum antiferromagnets on the hexagonal lattice. Using the optimum ground state approach we determine the ground state in d…
Thermodynamic properties and thermal correlation lengths of a Hubbard model with bond-charge interaction
Andreas Kemper, Andreas Schadschneider
We investigate the thermodynamics of a one-dimensional Hubbard model with bond-charge interaction X using the transfer matrix renormalization group method (TMRG). Numerical results…
Excitations of anisotropic spin-1 chains with matrix product ground state
E. Bartel, A. Schadschneider, J. Zittartz
We investigate a large class of antiferromagnetic spin-1 chains with nearest neighbour interaction and exactly known matrix product ground state. The spectrum of low-lying excitati…