Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Ultra-cold atoms (joint session A/Q)
Q 26.2: Vortrag
Mittwoch, 13. März 2019, 10:45–11:00, S HS 1 Physik
Effect of Fermi seas on the Efimov spectrum of three ultracold fermionic atoms — •Ali Sanayei1, Pascal Naidon2, and Ludwig Mathey1,3 — 1Center for Optical Quantum Technologies, Institute for Laser Physics, University of Hamburg, Germany — 2RIKEN Nishina Centre, RIKEN, Japan — 3The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
We consider two same-species ultracold fermionic atoms in different hyperfine splitting states in a lower band that are subject to an inert Fermi sea and interact attractively in the short range. We include an additional third fermionic atom in an otherwise empty band that interacts attractively in the short range with other two atoms. For three species with the same mass and also for some higher mass imbalances, we show that for either two- or three-resonantly interacting pairs the Fermi sea deforms the Efimov spectrum of the trimer states systematically. We also demonstrates that the Fermi sea modifies the Efimov universal scaling factor.