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How to realize long-range interaction of colds atom in an optical lattice?

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In the Bose-Hubbard model of cold atoms in an optical lattice, we consider only the short-range interaction or on-site interaction. Is it possible to realize long-range interaction similar to Coulomb interaction in the cold atom experiment?

This post imported from StackExchange Physics at 2014-03-24 04:15 (UCT), posted by SE-user Jeremy
asked Nov 22, 2013 in Experimental Physics by Jeremy (105 points) [ no revision ]
retagged Mar 24, 2014 by dimension10

2 Answers

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A way to get long-range interactions in cold atoms is to use polar molecules, which is a rapidly growing field in the cold atoms community.

This post imported from StackExchange Physics at 2014-03-24 04:15 (UCT), posted by SE-user Adam
answered Nov 22, 2013 by Adam (75 points) [ no revision ]
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Check out the introduction of e.g. this paper for an example of long range Van der Waals forces, which are encountered in cold atom experiments. These forces occur between highly excited atoms called Rydberg atoms and behave as $n^{11}/r^6$, where $n$ is the principal quantum number, which is extraordinary high for these atoms.

This post imported from StackExchange Physics at 2014-03-24 04:15 (UCT), posted by SE-user Funzies
answered Jan 21, 2014 by Funzies (5 points) [ no revision ]

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