Parametric Excitation of a 1D Gas in Integrable and Nonintegrable Cases

M. Colomé-Tatché 1, D. S. Petrov 2, 3

Physical Review Letters 106 (2011) 125302

We study the response of a highly excited 1D gas with pointlike interactions to a periodic modulation of the coupling constant. We calculate the corresponding dynamic structure factors and show that their low-frequency behavior differs dramatically for integrable and nonintegrable models. Nonintegrable systems are sensitive to excitations with frequencies as low as the mean level spacing, whereas much higher frequencies are required to excite an integrable system. This effect can be used as a probe of integrability for mesoscopic 1D systems and can be observed experimentally by measuring the heating rate of a parametrically excited gas.

  • 1. Institut fur Theoretische Physik,
    Leibniz Universität Hannover
  • 2. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
    CNRS : UMR8626 – Université Paris XI - Paris Sud
  • 3. National Research Centre "Kurchatov Institute" (NRC KI),
    University of Moscow