Heidelberg 2015 – wissenschaftliches Programm
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SYEP: Symposium Efimov Physics
SYEP 1: Symposium Efimov Physics I
SYEP 1.4: Vortrag
Montag, 23. März 2015, 12:45–13:00, C/gHS
Limit Cycles from the Similarity Renormalization Group — •Patrick Niemann1 and Hans-Werner Hammer1,2 — 1Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
Renormalization group (RG) limit cycles have been identified and studied in several systems. We investigate the limit cycle with the similarity renormalization group (SRG). In nuclear physics the SRG is applied to soften nuclear potentials in order to achieve improved numerical convergence.
We search for signatures of limit cycles in SRG evolved potentials. We examine two different systems, which exhibit the limit cycle. The first system is a two-body system with the 1/R2 potential and the second one is a three-body system with resonant interactions, where the Efimov effect occurs. Besides the standard kinetic energy generator we apply two other generators.