Today:
There are no scheduled talks today.
Upcoming:
An Introduction to Scanning Near-Field Optical Microscopy
Christian Huck
Mon, 28 May 2018, 09:15
Superconducting qubits
Benjamin Weinläder
Tue, 29 May 2018, 16:00
Biology, physics and evolution of bacterial motility
Victor Sourjik
Tue, 29 May 2018, 16:00

Multiply quantised vortices in fermionic superfluids: angular momentum, unpaired fermions, and spectral asymmetry

Sergej Moroz , Technical University Munich
Quantized vortices are a hallmark of superfluids and superconductors. In this seminar I will talk about the orbital angular momentum Lz of an s-wave paired superfluid in the presence of an axisymmetric multiply quantised vortex. For vortices with winding number |k| > 1, I will argue that in the weak-pairing BCS regime, Lz is significantly reduced from its value Lz=\hbar N k/2 in the BEC regime, where N is the total number of fermions. This deviation results from the presence of unpaired fermions in the BCS ground state, which arise as a consequence of spectral flow along the vortex sub-gap states.
Many-Body Theory
17 Jan 2018, 14:00
Institut für Theoretische Physik, Phil19

Add to calendar Add to calendar