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Non-Abelian optical lattices: anomalous quantum Hall effect and Dirac fermions

Non-Abelian optical lattices: anomalous quantum Hall effect and Dirac fermions

Physical Review Letters 103(3): 035301

We study the properties of an ultracold Fermi gas loaded in an optical square lattice and subjected to an external and classical non-Abelian gauge field. We show that this system can be exploited as an optical analogue of relativistic quantum electrodynamics, offering a remarkable route to access the exotic properties of massless Dirac fermions with cold atoms experiments. In particular, we show that the underlying Minkowski space-time can also be modified, reaching anisotropic regimes where a remarkable anomalous quantum Hall effect and a squeezed Landau vacuum could be observed.

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Accession: 054636148

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PMID: 19659289

DOI: 10.1103/PhysRevLett.103.035301

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