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Publikováno v:
J.Phys.A42:205206,2009
We exclude the center of mass of the N-particle rational Calogero model and consider the angular part of the resulting Hamiltonian. We show that it describes the motion of the particle on (N-2)-dimensional sphere interacting with N(N-1)/2 force cente
Externí odkaz:
http://arxiv.org/abs/0808.0430
Using Density-Matrix Renormalization Group, we investigate the general phase diagram of the frustrated two-leg ladder with Heisenberg interactions along legs, rungs and diagonals. We confirm that all antiferromagnetic gapped states belong to the same
Externí odkaz:
http://arxiv.org/abs/cond-mat/0011355
Publikováno v:
Phys. Rev. B 61, 11432 (2000)
Electron and phonon states in two different models of intentionally disordered superlattices are studied analytically as well as numerically. The localization length is calculated exactly and we found that it diverges for particular energies or frequ
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912175
Autor:
Harutunyan, V. V., Hakobyan, T. S., Hovhannesian, A. S., Gevorkyan, V. A., Grigoryan, N. E., Avakyan, A. K., Grigoryan, V. A.
Optical reflection spectra of corundum single crystals grown by HOC and Verneil methods are investigated before and after irradiated by electrons and neutrons using synchrotron radiation polarization (5-30eV).
Comment: 12 pages, LaTeX file, usin
Comment: 12 pages, LaTeX file, usin
Externí odkaz:
http://arxiv.org/abs/cond-mat/9806352
Publikováno v:
J.Math.Phys. 40 (1999) 5687
We have constructed a one dimensional exactly solvable model, which is based on the t-J model of strongly correlated electrons, but which has additional quantum group symmetry, ensuring the degeneration of states. We use Bethe Ansatz technique to inv
Externí odkaz:
http://arxiv.org/abs/cond-mat/9802204
Publikováno v:
Mod.Phys.Lett. A13 (1998) 495-503
We consider exactly solvable 1d multi-band fermionic Hamiltonians, which have affine quantum group symmetry for all values of the deformation. The simplest Hamiltonian is a multi-band t-J model with vanishing spin-spin interaction, which is the affin
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702128
Publikováno v:
Journal of Contemporary Physics; Mar2024, Vol. 59 Issue 1, p28-35, 8p
Publikováno v:
Nucl. Phys. B, 490 (1997) 633-652
We construct the family of spin chain Hamiltonians, which have affine quantum group symmetry. Their eigenvalues coincide with the eigenvalues of the usual spin chain Hamiltonians, but have the degeneracy of levels, corresponding to affine quantum gro
Externí odkaz:
http://arxiv.org/abs/cond-mat/9609183
Autor:
Hakobyan, T., Sedrakyan, A.
Publikováno v:
Phys. Lett. B377 (1996) 250
We construct the family of spin chain Hamiltonians, which have affine $U_q g$ guantum group symmetry. Their eigenvalues coincides with the eigenvalues of the usual spin chain Hamiltonians which have non-affine $U_q g_0$ quantum group symmetry, but ha
Externí odkaz:
http://arxiv.org/abs/hep-th/9506195