TY - JOUR
T1 - Quantum magnetism of ultracold atoms with a dynamical pseudospin degree of freedom
AU - Graß, Tobias
AU - Celi, Alessio
AU - Lewenstein, Maciej
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/10/23
Y1 - 2014/10/23
N2 - We consider bosons in a Hubbard lattice with an SU(N) pseudospin degree of freedom which is made dynamical via a coherent transfer term. It is shown that, in the basis which diagonalizes the pseudospin coupling, a generic hopping process affects the spin state, similarly to a spin-orbit coupling. This results, for the system in the Mott phase, in a ferromagnetic phase with a variable quantization axis. In extreme cases, it can even give rise to antiferromagnetic order.
AB - We consider bosons in a Hubbard lattice with an SU(N) pseudospin degree of freedom which is made dynamical via a coherent transfer term. It is shown that, in the basis which diagonalizes the pseudospin coupling, a generic hopping process affects the spin state, similarly to a spin-orbit coupling. This results, for the system in the Mott phase, in a ferromagnetic phase with a variable quantization axis. In extreme cases, it can even give rise to antiferromagnetic order.
UR - https://www.scopus.com/pages/publications/84908134207
U2 - 10.1103/PhysRevA.90.043628
DO - 10.1103/PhysRevA.90.043628
M3 - Article
AN - SCOPUS:84908134207
SN - 1050-2947
VL - 90
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 043628
ER -