Physics NotePublished
Quantum Spin Ladder Systems Associated with <math>su</math>(2|2).
A. Foerster; K.E. Hibberd; J.R. Links; I. Roditi
2000
Publication details
- Authors
- A. Foerster; K.E. Hibberd; J.R. Links; I. Roditi
- Type
- Physics Note
- Status
- Published
- Publication date
- 2000
- Description
- Two integrable quantum spin ladder systems will be introduced associated with the fundamental <math>su</math>(2|2) solution of the Yang-Baxter equation. The first model is a generalized quantum Ising system with Ising rung interactions. In the second model the addition of extra interactions allows us to impose Heisenberg rung interactions without violating integrability. The existence of a Bethe ansatz solution for both models allows us to investigate the elementary excitations for antiferromagnetic rung couplings. We find that the first model does not show a gap whilst in the second case there is a gap for all positive values of the rung coupling.
- Year
- 2000
- Number
- CBPF-NF-068/00
- Linked to a thesis
- No
- Linked to a grant
- No