+++ONLINE KOLLOQUIUM+++ A Fermi gas of molecules with tunable dipolar interactions (MCQST-Kolloquium) (Prof. Dr. Jun Ye)

  • Datum: 23.02.2021
  • Uhrzeit: 16:00
  • Vortragende(r): Prof. Dr. Jun Ye
  • JILA, National Institute of Standards and Technology, and University of Colorado
The advent of a degenerate Fermi gas of polar molecules sets the stage to explore novel many-body physics. We apply a precisely controlled electric field to tune the elastic dipolar interaction by orders of magnitude while suppressing reactive losses.

Efficient dipolar evaporation leads to the onset of quantum degeneracy in two-dimensional optical traps. When the electric field is used to tune excited molecular rotational states into degeneracy with the scattering threshold, we observe sharp collision resonances that give rise to three orders-of-magnitude modulation of the chemical reaction rate. Using this resonant shielding, we realize a long lifetime for a bulk molecular gas with tunable interactions.

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