Hyperbolic Deformation Applied to S = 1 Spin Chains - Scaling Relation in Excitation Energy -
arXiv:1102.0845 · doi:10.1143/JPSJ.80.094001
Abstract
We investigate excitation energies of hyperbolically deformed S = 1 spin chains, which are specified by the local energy scale f_j^{~} = \cosh j λ, where j is the lattice index and λis the deformation parameter. The elementary excitation is well described by a quasiparticle hopping model, which is also expressed in the form of hyperbolic deformation. It is possible to estimate the excitation gap Δin the uniform limit λ\rightarrow 0, by means of a finite size scaling with respect to the system size N and the deformation parameter λ.
5 pages, 4 figures
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