Abstract
On the basis of periodic boundary conditions we study perturbatively a large N asymptotics (N is the number of rungs) for the ground state energy density and gas parameter of a spin ladder with slightly destroyed rung-dimerization. Exactly, rung-dimerized spin ladder is treated as the reference model. Explicit perturbative formulas are obtained for three special classes of spin ladders.
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Bibikov, P. On the ground state energy scaling in quasi-rung-dimerized spin ladders. Eur. Phys. J. B 86, 174 (2013). https://doi.org/10.1140/epjb/e2013-30839-3
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DOI: https://doi.org/10.1140/epjb/e2013-30839-3