Exploring spin-orbital models with dipolar fermions in zig-zag optical lattices

TL;DR

This paper investigates how ultra-cold dipolar fermions in zig-zag optical lattices can simulate complex spin-orbital models, revealing new quantum phases due to the interplay of lattice geometry and quantum dynamics.

Contribution

It introduces a method to emulate solid-state spin-orbital models using cold atom systems, highlighting the emergence of novel quantum phases from geometric and dynamical interactions.

Findings

Identification of two physical systems for simulation

Discovery of a rich variety of quantum phases

Demonstration of the impact of lattice geometry on quantum dynamics

Abstract

Ultra-cold dipolar spinor fermions in zig-zag type optical lattices can mimic spin-orbital models relevant in solid-state systems, as transition-metal oxides with partially filled d-levels, with the interesting advantage of reviving the quantum nature of orbital fluctuations. We discuss two different physical systems in which these models may be simulated, showing that the interplay between lattice geometry and spin-orbital quantum dynamics produces a wealth of novel quantum phases.