Four-state models and Clifford algebras
@article{Hinrichsen1994FourstateMA, title={Four-state models and Clifford algebras}, author={Haye Hinrichsen}, journal={Journal of Physics A}, year={1994}, volume={27}, pages={5393-5407} }
With appropriate boundary conditions the anisotropic XY chain in a magnetic field is known to be invariant under quantum group transformations. We generalize this model defining a class of integrable chains with several fermionic degrees of freedom per site. In order to maintain the quantum group symmetry a general condition on the parameters of these systems is derived. It is shown that the corresponding quantum algebra is a multi-parameter deformation of the Clifford algebra. Discussing a…
6 Citations
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References
SHOWING 1-10 OF 19 REFERENCES
Quantum Clifford-Hopf algebras for even dimensions
- Mathematics
- 1994
In this paper we study the quantum Clifford-Hopf algebras CHq(D) for even dimensions, D, and obtain their intertwiner R-matrices, which are elliptic solutions to the Yang-Baxter equation. In the…
A two-parameter deformation of the SU (1|1) superalgebra and the XY quantum chain in a magnetic field
- Mathematics, Physics
- 1992
Deformed SU(2) Heisenberg chain
- Physics
- 1991
The general Hamiltonian for the SU(2)q-invariant arbitrary-spin Heisenberg chain is presented. Some of these interactions are shown to satisfy braid group relations and the Temperley-Lieb algebra…
Solvable q-state models in lattice statistics and quantum field theory
- Physics
- 1981
The commutation of transfer matrices of q-state lattice models are studied and solutions which generalize both the q = 2 ferroelectric models and the special q = 3 models of Stroganov are found. For…
Free Fermionic Elliptic Reflection Matrices and Quantum Group Invariance
- Physics, Mathematics
- 1993
Diagonal solutions for the reflection matrices associated to the elliptic R matrix of the eight-vertex free fermion model are presented. They lead through the second derivative of the open chain…
The XXZ Heisenberg chain, conformal invariance and the operator content of c < 1 systems
- Mathematics
- 1989
The spin-1/2XXZ Heisenberg chain, the quantum algebra Uq[sl(2)], and duality transformations for minimal models
- Physics
- 1993
The finite-size scaling spectra of the spin-1/2XXZ Heisenberg chain with toroidal boundary conditions and an even number of sites provide a projection mechanism yielding the spectra of models with a…
$q$ Deformations of the O(3) Symmetric Spin 1 Heisenberg Chain
- Physics
- 1990
The authors present the general expression for the spin-1 Heisenberg chain invariant under the Uq(SO(3)) quantum algebra. Several physical and mathematical implications are discussed.