Simulation and detection of Dirac fermions with cold atoms in an optical lattice

Details Simulation and detection of Dirac fermions with cold atoms in an optical lattice Simulation and detection of Dirac fermions with cold atoms in an optical lattice

2007-03-17

arxiv.org/abs/cond-mat/0703454v2

Phys. Rev. Lett 98, 260402 (2007)

Physics

Condensed Matter

Materials Science

4 pages; Published version

Scientific paper

10.1103/PhysRevLett.98.260402

We propose an experimental scheme to simulate and observe relativistic Dirac fermions with cold atoms in a hexagonal optical lattice. By controlling the lattice anisotropy, one can realize both massive and massless Dirac fermions and observe the phase transition between them. Through explicit calculations, we show that both the Bragg spectroscopy and the atomic density profile in a trap can be used to demonstrate the Dirac fermions and the associated phase transition.

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