Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster Ultrakalte Moleküle

Q 63.8: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster C

The Efimov Molecule: Is the Efimov effect really incomprehensible? — •Bettina Berg¹, Misha Ivanov², Lev Plimak¹, and Wolfgang P. Schleich¹ — ¹Institut für Quantenphysik, Universität Ulm, D-89069 Ulm, Germany — ²NRC Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada

We investigate the so-called Efimov molecule, formed by two heavy and one light particle interacting via short-range potentials between the light particle and the heavy ones. Applying what we call "Quantum Chemistry 101" in the Born-Oppenheimer limit for the square-well model of the "light-heavy" potential, we obtain the molecular term with the characteristic ∼ 1/R² behaviour of the Efimov potential. This derivation is physically straightforward, making the Efimov molecule arguably the simplest possible example of a three-body system exhibitig the Efimov effect. We also present an equation generalising this result to an arbitrary "light-heavy" potential.