1997/10/31 by Ian Affleck · 4 citations
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Quantum many-body systems #Theoretical and Computational Physics #cond-mat.str-el #hep-th
paper · pdf · doi:10.1088/0305-4470/31/12/003
5 pages, further result added, to appear in J. Phys. A
arxiv created 1998/02/12 · openalex publication_date 1998/03/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
The critical behaviour associated with a transverse magnetic field applied at the edge of a semi-infinite chain is calculated using field theory techniques. Contrary to a recent claim, we find that the long-time behaviour is given by a renormalization group fixed point corresponding to an infinite field which polarizes the spin at the edge. The zero-temperature entropy and position-dependent magnetization are calculated.