Event Details
Speaker Name
Monica Gutierrez Galan
Start Date & Time
2021-07-12 2:00 pm
End Date & Time
2021-07-12 2:00 pm
Semester
Event Type
Event Details

Dissertation Committee Chair: James Williams, Chair

 

Committee: 

Gretchen Campbell, Co-Chair/Advisor

Ian Spielman

Theodore Jacobson

Ronald Walsworth, Dean's Representative

 

Abstract:

This thesis presents the construction and characterization of an experimental apparatus to produce sodium Bose-Einstein condensates (BECs) in  arbitrary potentials.

Particular attention is devoted to the study of toroidal BECs as platforms for analogue cosmology models.

We also report the first results from this apparatus in which we we studied the red-shifting  and attenuation of azimuthal phonons in expanding toroidal BECs as well as  blue-shifting and amplification of azimuthal phonons in contracting toroidal BECs.

The amplification and attenuation of the azimuthal phonons is the result of a fictitious friction term that arises from the changing metric dictated by the background BEC, this fictitious friction is analogous to the Hubble friction term present in models of the inflaton in cosmology.

Location: https://umd.zoom.us/j/8689968173

Misc
Groups
TEMP migration NID
21146