We construct the family of spin chain hamiltonians, which have affine quantum group symmetry U q ˆ g. Their eigenvalues coincide with the eigen-values of the usual spin chain hamiltonians, but have… (More)

We construct the family of spin chain Hamiltonians, which have affine quantum group symmetry U q ˆ g. Their eigenvalues coincide with the eigen-values of the usual spin chain Hamiltonians, but have… (More)

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… (More)

We present a model for alloys of compound semiconductors by introducing a one-dimensional binary random system where impurities are placed in one sublattice while host atoms lie on the other… (More)

A series of N-l,N′-(n + 2)-bis[3-cyano(ethoxycarbonyl)-4,5-dimethylthiophen-2-yl]alkanediamides have been synthesized by acylating 4,5-dimethyl-2-amino-3-cyano(ethoxycarbonyl)thiophenes with the… (More)

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… (More)