Quantum magnetism of ultracold atoms with a dynamical pseudospin degree of freedom

Abstract

We consider bosons in a Hubbard lattice with an SU($\mathcal{N}$) 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, similar to a spin-orbit coupling. This results, for the system in the Mott phase, in a ferromagnetic phase with variable quantization axis. In extreme cases, it can even give rise to antiferromagnetic order.

12 pages, 3 figures

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Cited by in corpus (9)

• Topological Photonics
• Topological Photonics
• Synthetic dimensions for topological and quantum phases: Perspective
• Spiral spin textures of bosonic Mott insulator with SU(3) spin-orbit coupling
• Measuring Chern numbers in Hofstadter strips
• Different models of gravitating Dirac fermions in optical lattices
• Baryon squishing in synthetic dimensions by effective $SU(M)$ gauge fields
• Phase transitions of the coherently coupled two-component Bose gas in a square optical lattice
• Competing valence bond and symmetry breaking Mott states of spin-3/2 fermions on a honeycomb lattice