Equivalence of the antiferromagnetic Heisenberg ladder to a single S=1 chain

Article

关键词: QUANTUM SPIN CHAINS;    HALDANE-GAP PHASE;    RENORMALIZATION-GROUPS;    COMPOSITE SPIN;    SUPERCONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.53.52

来源: SCIE

【 摘 要 】

I introduce two continuous transformations between the S=1 Heisenberg chain and the antiferromagnetic S=1/2 Heisenberg ladder. Both transformations couple diagonally situated next-nearest-neighbor S=1/2's to form each S=1. Using the density matrix renormalization group, I demonstrate that the two systems are in the same phase. Furthermore, I find that the hidden topological long-range order characterizing the S=1 system is even stronger in the isotropic two-chain system.

【 授权许可】

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