Topological Order, Dimerization, and Spinon Deconfinement in Frustrated Spin Ladders

Abstract

We consider topological order and dimer order in several frustrated spin ladder models, which are related to higher dimensional models of current interest; we also address the occurrence of fractionalized phases with deconfined spinon excitations in these models. Combining results obtained with both analytic and numerical methods, we discuss how the occurrence of dimerized or fractionalized phases are dictated by the system's geometry.

18 pages, 21 figures

References in corpus (5)

• Quantum Phase Transitions and Bipartite Entanglement
• Entanglement in a second order quantum phase transition
• Entanglement in a first order quantum phase transition
• Entanglement and Quantum Phase Transition Revisited
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Cited by in corpus (2)

• Antiferromagnetic ordering of energy levels for spin ladder with four-spin cyclic exchange: Generalization of the Lieb-Mattis theorem
• A general CFT model for antiferromagnetic spin-1/2 ladders with Mobius boundary conditions