Upcoming Webinar
We invite you to join a virtual meeting of the Action on:
Friday, April 25, at 14:15 CET
Speaker: Gabriel Wlazłowski, Warsaw University of Technology & University of Washington.
Title: Vortices in Bose and Fermi superfluids: similarities and differences.
Abstract:
Quantum vortices are among the most well-known examples of topological excitations in superfluids. They appear in both bosonic systems (such as liquid helium-4 below the lambda point and atomic Bose-Einstein condensates) and fermionic systems (such as superfluid helium-3, metallic superconductors, and neutron matter). While the topology of the order parameter determines many vortex properties, others arise from quantum statistics.
In this webinar, I will review studies of quantum vortices in Fermi systems and contrast them with their bosonic counterparts. In particular, I will discuss how the vortex core structure evolves across the BCS-BEC crossover, from weak to strong coupling. I will then examine how these structural differences influence vortex dynamics, including the emergence of vortex inertia in Fermi superfluids and the origins of dissipative processes observed in their motion.
The discussion will be supported by numerical results obtained using density functional theory for Fermi superfluids and the Gross-Pitaevskii equation for Bose superfluids.
To ensure smooth participation, please set your Zoom display name to include your full name and institution for identification purposes.
We look forward to your participation on April 25.