Weyl points in three-dimensional optical lattices: synthetic magnetic monopoles in momentum space

2014/12/24 by Tena Dubček, Colin J. Kennedy, Ling Lu +3 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.114.225301

published as Phys. Rev. Lett. 114, 225301 (2015) · are welcome

arxiv created 2014/12/24 · arxiv updated 2016/08/10

Abstract

We show that Hamiltonians with Weyl points can be realized for ultracold atoms using laser-assisted tunneling in three-dimensional optical lattices. Weyl points are synthetic magnetic monopoles that exhibit a robust, three-dimensional linear dispersion. They are associated with many interesting topological states of matter, such as Weyl semimetals and chiral Weyl fermions. However, Weyl points have yet to be experimentally observed in any system. We show that this elusive goal is well-within experimental reach with an extension of the techniques recently used to obtain the Harper Hamiltonian.

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