Seminar "Vortex lattices and collective oscillations of a coupled Bose-Fermi superfluid mixture" Yu-Ao Chen

Quantum Systems Unit (Busch U) would like to invite you a seminar by Professor Yu-Ao Chen.

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Date: Friday, 24th February
Time: 11:00-12:00
Venue: C016, Level C, Lab1
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Speaker:
Professor Yu-Ao Chen

¹ CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China
² CAS-Alibaba Quantum Computing Laboratory, Shangha
 

Title & Abstract:
Vortex lattices and collective oscillations of a coupled Bose-Fermi superfluid mixture

The superfluid mixture of interacting Bose and Fermi species is a remarkable many-body quantum system. Dilute degenerate atomic gases, especially for two species of distinct masses, are excellent candidates for exploring fundamental features of superfluid mixture. In this talk, I will present our recent experimental progress on the realization of a two-species superfluid mixture. Moreover, vortex lattices—quantized topological excitations of superfluid—are successfully generated and directly visualized in both the single- and the two-species superfluids. The formation and decay of the two-species vortices reveal pronounced effects of the inter-species interaction. We further study the collective oscillations and the frequency shifts are clearly observed both in the bosonic and fermionic superfluid components. The frequency shifts of both components display some resonance-like characteristics as the system is tuned across the BEC-BCS crossover. All these rich phenomena challenge theoretical understanding.

We look forward to seeing many of you at this seminar.

Best regards,
Quantum Systems Unit