Conjectures an asymptotic formula for the Haldane gap at large integer spins and reports that topological order in the spin-1 chain vanishes smoothly in ladders without a phase transition.
Schollwoeck , journal Annals of Physics volume 326 , pages 96 ( year 2011 ), ISSN issn 0003-4916 , ://www.sciencedirect.com/science/article/pii/S0003491610001752
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Physics of integer spin antiferromagnetic chains : Haldane gaps and edge states
Conjectures an asymptotic formula for the Haldane gap at large integer spins and reports that topological order in the spin-1 chain vanishes smoothly in ladders without a phase transition.