Volume 85, Number 1, January 2009
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||16 January 2009|
Phonon-induced artificial magnetic fields in optical lattices
Clarendon Laboratory, University of Oxford - Parks Road, Oxford OX1 3PU, UK, EU
2 Keble College, University of Oxford - Parks Road, Oxford OX1 3PG, UK, EU
Corresponding author: firstname.lastname@example.org
Accepted: 4 December 2008
We investigate the effect of a rotating Bose-Einstein condensate on a system of immersed impurity atoms trapped by an optical lattice. We analytically show that for a one-dimensional, ring-shaped setup the coupling of the impurities to the Bogoliubov phonons of the condensate leads to a non-trivial phase in the impurity hopping. The presence of this phase can be tested by observing a drift in the transport properties of the impurities. These results are quantitatively confirmed by a numerically exact simulation of a two-mode Bose-Hubbard model. We also give analytical expressions for the occurring phase terms for a two-dimensional setup. The phase realises an artificial magnetic field and can, for instance, be used for the simulation of the quantum Hall effect using atoms in an optical lattice.
PACS: 37.10.Jk – Atoms in optical lattices / 03.75.-b – Matter waves / 67.85.-d – Ultracold gases, trapped gases
© EPLA, 2009
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