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Center for Nonlinear Studies |
When two particles attract via a resonant short-range interaction, three particles always form an infinite tower of bound states characterized by a discrete scaling symmetry. This phenomenon is called as the Efimov effect. Keywords regarding the Efimov effect are universality, scale invariance, quantum anomaly, and renormalization group limit cycle. I will give a pedagogical talk on how these keywords appear in its understanding and discuss its observation in ultracold atom experiments. Then if time permits, I would like to introduce my recent work in which such few-body physics plays an important role to probe many-body physics of strongly-interacting atomic gases.
Host: Ivan Vitev, T-2: NUC & PARTICLE PHYS, ASTROPHYS & COSMOLOGY