Today:
There are no scheduled talks today.
Upcoming:
Testing the equivalence principle on cosmological scales
Pierre Fleury
Wed, 28 Feb 2018, 17:15
TBD
Chris Faesi
Thu, 1 Mar 2018, 11:00
Dissecting the IRX - beta dust attenuation relation
Gergely Popping
Thu, 1 Mar 2018, 11:00
Preliminary Design of the MICADO Calibration Assembly
Gabriele Rodeghiero
Fri, 2 Mar 2018, 10:00

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

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