Exact spontaneous plaquette ground states for high-spin ladder models

2005/07/31 by Shu Chen, Congjun Wu, Shou-Cheng Zhang +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.72.214428

published as Phys. Rev. B 72, 214428 (2005) · 4 pages, 3 figures, version to be published in Phys. Rev. B

arxiv created 2005/12/01 · openalex publication_date 2005/12/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the exchange physics in high-spin Mott insulating systems with S=3∕2 which is realizable in ultracold atomic systems. The high symmetry of SO(5) or SU(4) therein renders stronger quantum fluctuations than the usual spin-1∕2 systems. A spontaneous plaquette ground state without any site and bond spin orders is rigorously proved in a ladder spin-3∕2 model, whose topological excitations exhibit fractionalization behavior. The generalization to the SU(N) plaquette state is also investigated.

Citations

• SU(4) spin-orbit critical state in one dimension
• On Next-Nearest-Neighbor Interaction in Linear Chain. I
• Néel and Spin-Peierls Ground States of Two-DimensionalSU(N)Quantum Antiferromagnets
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• Phase Diagram of an Asymmetric Spin Ladder
• SU(4) Theory for Spin Systems with Orbital Degeneracy