Group Seminar via Zoom:  Studying universal dynamics and thermalization with spinor Bose gases

February 08, 2022

Dr. Maximilian Prüfer, TU Vienna
Group meeting via video conference (Zoom)
Tuesday, February 08, 9:00 am (MEZ)

Due to the Covid-19 pandemic, the group seminar will be a hybrid event, allowing participants to attend the seminar virtually
and in-person. This procedure enables us to continue our research, enhance discussions and exchange important information.

On the macroscopic level novel, and even universal, phenomena can emerge. The underlying loss of information makes these phenomena insensitive to microscopic details and thus renders them interesting for quantum simulations of many-body systems. I will present experimental studies with 87Rb spinor Bose-Einstein condensates obtained in the Oberthaler group in Heidelberg. Employing quantum quenches, we bring the system out of equilibrium and observe transient universal phenomena associated with the emergence of a non-thermal fixed point. In a box-like trapping potential we follow the system’s dynamics beyond the non-thermal fixed point and observe its approach to thermal equilibrium. Here we characterize the underlying quasi-particle excitations by probing the dispersion relations and find two Goldstone modes which are associated with the emergence of long-range coherence in the density and spin degree of freedom.

If you would like to join our group seminar via Zoom, please contact us for more information.

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