2000/03/31 by Izumi Tsutsui, Tamás Fülöp, Tamas Fulop +1
Chemistry · Mathematics · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Quantum and electron transport phenomena #Quantum chaos and dynamical systems #cond-mat #math-ph #math.MP #quant-ph
paper · pdf · doi:10.1143/jpsj.69.3473
published as Jour. Phys. Soc. Jpn. 69 (2000) 3473 · 4 pages ReVTeX with 4 epsf figures. KEK preprint 2000-3. Correction in Eq.(14)
arxiv created 2000/04/14 · openalex publication_date 2000/11/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study systems with parity invariant contact interactions in one dimension. The model analyzed is the simplest nontrivial one --- a quantum wire with a point defect --- and yet is shown to exhibit exotic phenomena, such as strong vs weak coupling duality and spiral anholonomy in the spectral flow. The structure underlying these phenomena is SU(2), which arises as accidental symmetry for a particular class of interactions.