A. Celi, P. Massignan, J. Ruseckas, N. Goldman, I. B. Spielman, G. Juzeliunas, M. Lewenstein
We propose a simple scheme to generate a cold-atom lattice pierced by a uniform magnetic field. Our method is based on a one-dimensional optical lattice extended by a synthetic dimension provided by the internal atomic degrees of freedom, effectively yielding a synthetic 2D lattice. Suitable laser-coupling of different internal states leads to a uniform magnetic flux within the 2D lattice. We show that this setup allows to study the main features of magnetic lattice systems, such as the fractal Hofstadter butterfly spectrum and the chiral edge states of the associated Chern insulating phases.
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http://arxiv.org/abs/1307.8349
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