Exactly solvable quantum spin tubes and ladders

Details Exactly solvable quantum spin tubes and ladders Exactly solvable quantum spin tubes and ladders

1999-07-09

arxiv.org/abs/cond-mat/9907134v1

J. Phys. A 32 (1999) L377-L380

Physics

Condensed Matter

Statistical Mechanics

6 pages, Latex, 1 eps fig, to appear in J. Phys. A

Scientific paper

10.1088/0305-4470/32/33/102

We find families of integrable n-leg spin-1/2 ladders and tubes with general isotropic exchange interactions between spins. These models are equivalent to su(N) spin chains with N=2^n. Arbitrary rung interactions in the spin tubes and ladders induce chemical potentials in the equivalent spin chains. The potentials are n-dependent and differ for the tube and ladder models. The models are solvable by means of nested Bethe Ansatz.

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