Dimerization in Quantum Spin Chains with O(n) Symmetry
Journal article, 2021

We consider quantum spins with S >= 1, and two-body interactions with O (2S + 1) symmetry. We discuss the ground state phase diagram of the one-dimensional system. We give a rigorous proof of dimerization for an open region of the phase diagram, for S sufficiently large. We also prove the existence of a gap for excitations.


Jakob Björnberg

Chalmers, Mathematical Sciences, Analysis and Probability Theory

University of Gothenburg

Peter Muhlbacher

The University of Warwick

Bruno Nachtergaele

University of California at Davis

Daniel Ueltschi

The University of Warwick

Communications in Mathematical Physics

0010-3616 (ISSN) 1432-0916 (eISSN)

Vol. 387 2 1151-1189

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4/5/2022 5