Time Changed:"Spin-orbit coupled Bose-Einstein condensates: Raman dressing and lattice-band pseudospins" Peter Engels

Spin-orbit coupled Bose-Einstein condensates: Raman dressing and lattice-band pseudospins

Prof. Peter Engels
Washington State University, USA

• Date: Wednesday, 9 March
• Time: 10:00-11:00→10:30-11:30
• Venue: D015, Level D, Lab1

Abstruct:
Dilute-gas Bose-Einstein Condensates provide a flexible platform to model a wide variety of condensed matter phenomena.  To this goal, "dressing" atoms with suitably tailored laser beams is a premier tool and can be used to generate spin-orbit coupling, artificial gauge fields, and lattice structures. In this talk, two sets of recent and ongoing experiments conducted at Washington State University will be described. A first set of experiments investigates Raman dressing of atoms to generate spin-orbit coupling. The resulting single-particle dispersion as well as the modified excitation spectrum of the many-body system are revealed. In the second set of experiments, we apply both static and moving optical lattices to form Floquet-Bloch states. The s-band and the px-band of the static lattice can be considered pseudospins, and it is shown that spin-orbit coupling can be introduced between such lattice band pseudospins. The notion of lattice band pseudospins provides a new viewpoint for quantum gas experiments that may pave the way for engineering novel quantum matter using hybrid orbital bands.

Hope to see many of you at the seminar.
Quantum Systems Unit