Speaker
Mr
Tobias Grass
(ICFO - The Institute of Photonic Science)
Description
Artificial gauge fields for cold atoms are tools for
producing topological quantum states. In spinless or
spin-polarized systems, cold bosons are known to support the
incompressible phases from the Read-Rezayi series,
containing also the famous Laughlin and Moore-Read states
with anyonic or even non-Abelian quasiparticle excitations.
Here we show that in the case of a pseudospin-1/2 Bose gas a
generalization of this series, the so-called non-Abelian
spin singlet (NASS) series, describes well the ground states
at different filling factors.
We have also investigated the scenario where, in addition to
an external magnetic field, the gauge field mimics an
intrinsic spin-orbit coupling of the Rashba type. We find a
variety of different phases, which can be controlled by the
strength of this coupling.
Primary author
Mr
Tobias Grass
(ICFO - The Institute of Photonic Science)
