Heidelberg 2015 – wissenschaftliches Programm
SYEP 2.3: Vortrag
Montag, 23. März 2015, 15:30–15:45, C/gHS
Few-body physics induced by p-wave resonance — •Maxim A. Efremov and Wolfgang P. Schleich — Institut für Quantenphysik, Universität Ulm, Germany
One of the most intriguing phenomenon of few-body physics is the Efimov effect , which manifests itself in an infinite number of weakly bound three-body states if at least two of the three two-body subsystems exhibit a single weakly s-wave bound state or resonance.
We present novel class of purely quantum-mechanical bound states in the system of three particles provided: (i) the system consists of a light particle and two heavy bosonic ones, (ii) the heavy-light short-range potential has a p-wave resonance, and (iii) all three particles move in either three  or two  space dimensions. In the case of an exact p-wave resonance and three dimensions, the effective potential between the two heavy particles is attractive and of long-range, supporting a finite number of bound states, with the spectrum strongly determined by the parameters of the underlying p-wave resonance. However, in two dimensions, the effective potential between the two heavy particles is attractive and of long-range, resulting in an infinite number of the universal bound states. Moreover, due to the weak dependence of the effective potential on the parameters of the planar p-wave resonance, the two-dimensional three-body bound states display a Coulomb series with a Gaussian cut-off governed solely by the mass ratio.  V. Efimov, Phys. Lett. B 33, 563 (1970)  M.A. Efremov, L. Plimak, M.Yu. Ivanov, and W.P. Schleich, PRL 111, 113201 (2013)  M.A. Efremov and W.P. Schleich, arXiv:1407.3352