Simulating and detecting artificial magnetic fields in trapped atoms

Details Simulating and detecting artificial magnetic fields in trapped atoms Simulating and detecting artificial magnetic fields in trapped atoms

2009-09-03

arxiv.org/abs/0909.0728v2

Phys. Rev. A 81, 013607 (2010)

Physics

Condensed Matter

Quantum Gases

14 pages, 9 figures. Published version

Scientific paper

10.1103/PhysRevA.81.013607

A Bose-Einstein condensate exhibiting a nontrivial phase induces an artificial magnetic field in immersed impurity atoms trapped in a stationary, ring-shaped optical lattice. We present an effective Hamiltonian for the impurities for two condensate setups: the condensate in a rotating ring and in an excited rotational state in a stationary ring. We use Bogoliubov theory to derive analytical formulas for the induced artificial magnetic field and the hopping amplitude in the limit of low condensate temperature where the impurity dynamics is coherent. As methods for observing the artificial magnetic field we discuss time of flight imaging and mass current measurements. Moreover, we compare the analytical results of the effective model to numerical results of a corresponding two-species Bose-Hubbard model. We also study numerically the clustering properties of the impurities and the quantum chaotic behavior of the two-species Bose-Hubbard model.

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