Ground state energy and mass gap of a generalised quantum spin ladder

Details Ground state energy and mass gap of a generalised quantum spin ladder Ground state energy and mass gap of a generalised quantum spin ladder

1999-07-30

arxiv.org/abs/cond-mat/9907480v1

J.Phys.A 33 (2000) 443-448

Physics

Condensed Matter

Statistical Mechanics

8 pages, Latex

Scientific paper

10.1088/0305-4470/33/3/301

We show that a 2-leg ladder hamiltonian introduced recently by Albeverio and Fei (cond-mat/9807341) can be made to satisfy the Hecke algebra. As a result we have found an equivalent representation of the eigenspectrum in terms of the spin-1/2 antiferromagnetic XXZ chain at $\Delta = - 5/3$. The values of thermodynamic quantities such as the ground state energy and mass gap follow from the known XXZ results.

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