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Quantum spin chains and the Haldane gap

1989/05/15 by Ian Affleck · 6 citations
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Computer science #Condensed matter physics #Excitation #Field (mathematics) #Integer (computer science) #Mathematics #Physics #Physics of Superconductivity and Magnetism #Pure mathematics #Quantum #Quantum mechanics #Spin (aerodynamics) #Theoretical and Computational Physics #Theoretical physics

paper · doi:10.1088/0953-8984/1/19/001

openalex publication_date 1989/05/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

One-dimensional antiferromagnets have exotic disordered ground states. As was first argued by Haldane (1983), there is an excitation gap for integer, but not half-integer, spin. The authors review the arguments for this behaviour based on field-theory mappings, the Lieb-Schultz-Mattis theorem, exactly solvable models, finite-chain diagonalisation and real experiments.

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