Quantum state control via trap-induced shape resonance in ultracold atomic collisions
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Updated: Aug 30, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
René Stock1, Ivan H Deutsch, Eric L Bolda
1Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA. restock@info.phys.unm.edu
Abstract:
We investigate controlled collisions between trapped but separated ultracold atoms. The interaction between atoms is treated self-consistently using an energy-dependent delta-function pseudopotential model, whose validity we establish. At a critical separation, a "trap-induced shape resonance" between molecular bound states and a vibrational eigenstate of the trap can occur. This resonance leads to an avoided crossing in the eigenspectrum as a function of separation. We investigate how this new resonance can be employed for quantum control.
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