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The Wright Research group uses ultra-cold quantum gases to study quantum many-body phenomena.

Areas of interest include macroscopic quantum phenomena (superfluidity), non-equilibrium dynamics, and coherent light-matter interactions.

Lab Location: Wilder Basement, Rooms 17/18
The lab is only accessible through room 18, for safety reasons. Please ring the doorbell if you need to reach someone in the lab.

Graduate Physics at Dartmouth:
Research in the Department of Physics and Astronomy
Ph.D. Requirements
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Undergraduate Research
Interested undergraduates should contact Prof. Wright. Dartmouth has numerous internal programs for supporting undergraduate research. (See the UGAR website. )

Recent Posts

Persistent Currents in a Molecular BEC of Fermions

We have just shown that we can clearly distinguish between a ring with a persistent current flowing around it and a stationary superfluid (molecular BEC of Li-6). The basic procedure is to relax the radial confinement of the atoms in the ring trap in a prescribed way, then suddenly release the atoms completely and allow the cloud to expand for several milliseconds. If there is (quantized) circulation around the ring then we see a hole in the middle of the expanded cloud, because of the phase singularity that must be present in the superfluid.

For comparison, if there is no circulation in the superfluid, then the expanded cloud looks like this:

Detecting the vortex signature in this expanding fermionic superfluid is a little more challenging to do well than in previous experiments with atomic Bose condensates (of e.g. rubidium or sodium). The cloud expands quite rapidly even for small numbers of atoms, because the momentum of the atoms is comparatively high due to degeneracy pressure. We’ve got a handle on this, though and it’s clearly not going to be an obstacle to the experiments we have planned. The images above mostly look noisy due to photon shot noise, and we expect to be able to du much better than this soon.

 

  1. Stirring Beam Installed Comments Off on Stirring Beam Installed
  2. Fermionic Atoms in Ring Lattices Comments Off on Fermionic Atoms in Ring Lattices
  3. Fermionic Lithium in a Ring Trap Comments Off on Fermionic Lithium in a Ring Trap
  4. Evaporation in the “Sheet” Trap Comments Off on Evaporation in the “Sheet” Trap