Gregor Jotzu and collaborators realized an artificial Haldane model in 2014. They loaded spin-polarized potassium-40 fermions into a laser-made honeycomb lattice. Piezoelectric mirrors shook the optical lattice along two axes; their relative phase controlled time-reversal symmetry breaking. Optical phase control adjusted the sublattice offset.[ref]
A magnetic field gradient drove Bloch oscillations. Band mapping measured interband transfer to locate valley-gap closures. Opposite-force drift measurements distinguished cancelling from reinforcing Berry curvature contributions; reversing shaking handedness reversed the drift. Interband transfer and harmonic confinement affected this readout, including drift beyond ideal transition lines. This neutral-atom Floquet Hamiltonian realization did not measure electrical sheet conductivity. Magnetic fields were used for preparation and forcing.[ref]

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  1. Haldane model
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