1995/06/28 by Julia M. Yeomans, J. M. Yeomans, Yeomans, J. M.
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9506129
14 pages, Revtex, 3 Figs. available upon request Oxford University
arxiv created 1995/06/28 · openalex publication_date 1995/06/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Models with competing interactions, for example the ANNNI model, can have special points at which the ground state is infinitely degenerate, so-called multiphase points. Small perturbations can lift this degeneracy and give rise to infinite sequences of long-period phases. This paper compares the effect of three possible perturbations, quantum fluctuations, thermal fluctuations and the softening of the spins from their quantised positions.