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Updated: Dec 30, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Spatial adiabatic passage of massive quantum particles in an optical Lieb lattice
Shintaro Taie1, Tomohiro Ichinose2, Hideki Ozawa2
1Department of Physics, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan. taie@scphys.kyoto-u.ac.jp.
Abstract:
Quantum interference lies at the heart of quantum mechanics. By utilizing destructive interference, it is possible to transfer a physical object between two states without populating an intermediate state which is necessary to connect the initial and final states. A famous application is a technique of stimulated Raman adiabatic passage, where atomic internal states can be transfered with high efficiency regardless of lossy intermediate states. One interesting situation is a case where the initial and final states are spatially well separated. Quantum mechanics allows a particle to move without practical possibility of being found at the intermediate area. Here we demonstrate this spatial adiabatic passage with ultracold atoms in an optical lattice. Key to this is the existence of dark eigenstates forming a flat energy band, with effective transfer between two sublattices being observed. This work sheds light on a study of coherent control of trapped cold atoms.
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