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Dipole interactions and magnon interferometry in a 87Rb spinor condensate

Event Details

Event Dates: 

Thursday, September 11, 2014 - 1:30pm

Seminar Location: 

  • JILA 10th Floor

Speaker Name(s): 

G. Edward Marti

Speaker Affiliation(s): 

JILA, Ye group
Seminar Type/Subject

Scientific Seminar Type: 

  • Other

Seminar Type Other: 

Bi-group Seminar

Event Details & Abstract: 

Collective excitations are an emergent phenomena. They are can look unlike the constituent particles of the system, but they depend on--and can probe--the underlying symmetries and many-body physics. In this talk I will focus on magnons, or spin wave excitations. We demonstrate a precise measurement of the magnon dispersion relation in the ferromagnetic phase and observe a many-body gap due to dipolar interactions. I will discuss applications of magnons towards thermometry and cooling of a Bose-Einstein condensate.