2001/02/20 by Giuseppe Albertini, Albertini, Giuseppe
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0102355
22 pages, including 2 tables. Revtex
arxiv created 2001/02/20 · arxiv updated 2009/11/30
A two-parameter family of quantum spin ladders with local bilinear and biquadratic interactions is shown to be solvable by a mapping onto fragments of integrable spin 1 chains. The phase diagram, consisting of four phases, and the ground state properties are discussed. In one novel phase, the ground state is made up of plaquette singlets and rung singlets, alternating with a three-rung periodicity.