Condensed Matter Physics Seminar

Dr Maxim Efremov, Ulm University, Germany

Friday 17 January 2014, 1500-1600
C1 Physics Building

Novel three-body bound states in atomic mixtures

One of the most intriguing phenomenon of few-body physics is the Efimov effect [1], 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. Although this effect was predicted almost half of a century ago, it has only recently been successfully verified [2] in experiments with the different cold atomic mixtures.

In this talk I provide an introduction into the mechanisms of forming bound states in few-body physics and briefly review the main theoretical ingredients of as well as the experiments confirming the Efimov effect, and present then a new series of the three-body bound states. The three-body system considered in this context consists of a light particle and two heavy ones, when the heavy-light short-range interaction potential has a resonant state with a non-zero orbital angular momentum [3], e.g., the p-wave resonant state. Such a system is in sharp contrast to the standard Efimov scenario, when the heavy-light short-range interaction has always the s-wave resonance. In summary I analyse possible avenues to verify this new effect experimentally.

[1] V. Efimov, Phys. Lett. B 33, 563 (1970)

[2] F. Ferlaino and R. Grimm, Physics 3, 9 (2010)

[3] M.A. Efremov, L. Plimak, M.Yu. Ivanov, and W.P. Schleich, Phys. Rev. Lett. 111, 113201 (2013)