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cond-mat.str-el1998
Excitation spectrum of the S=1/2 quantum spin ladder with frustration: elementary quasiparticles and many-particle bound states
V. N. Kotov, O. P. Sushkov, R. Eder
We study the excitation spectrum of the two-chain S=1/2 Heisenberg spin ladder with additional inter-chain second-neighbor frustrating interactions. The one and two-particle excita…
cond-mat.str-el1998
Dynamics of an SO(5) symmetric ladder model
R. Eder, A. Dorneich, M. G. Zacher +2
We discuss properties of an exactly SO(5) symmetric ladder model. In the strong coupling limit we demonstrate how the SO(3)-symmetric description of spin ladders in terms of bond B…