Mutually repulsive atoms placed at periodic intervals in a ‘crystal of light’ can, counterintuitively, be forced into stable couplings. That theoretical prediction has just seen experimental confirmation.
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Fallani, L., Inguscio, M. United through repulsion. Nature 441, 820–821 (2006). https://doi.org/10.1038/441820a
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DOI: https://doi.org/10.1038/441820a
