Erlangen 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 51: Poster: Quantum Optics and Photonics IV

Q 51.17: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal

Many-body phases of fermions coupled to an optical waveguide — •Kieran Fraser and Francesco Piazza — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

Ultracold atoms subject to a single cavity mode will, above a threshold pump strength, undergo a self-organisation transition, related to so-called superradiance. A similar effect is observed for atoms in the evanescent field of an optical fibre. We study the phase diagram and collective excitations of a degenerate Fermi gas coupled to the propagating modes of a multimode optical waveguide. The interplay between superradiant and Umklapp scattering gives rise to a rich phase diagram and to peculiar collective excitations.