On the ground state energy scaling in quasi-rung-dimerized spin ladders
Saint-Petersburg State University, Ulyanovskaya 1, Petrodvorets, 198504
a e-mail: bibikov@PB7855.spb.edu
Received in final form: 3 December 2012
Published online: 22 April 2013
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.
Key words: Computational Methods
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013