EdEarl Posted September 26, 2013 Share Posted September 26, 2013 Photons with strong mutual attraction in a quantum nonlinear medium. Credit: O. Firstenberg, et al., doi:10.1038/nature12512 The paper is in Nature. I suppose some of you have heard of this as a theoretical possibility; I had not, and am dumfounded. Link to comment Share on other sites More sharing options...
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