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Forty years of Efimov physics: How a bizarre prediction turned into a hot topic

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Francesca Ferlaino and Rudolf Grimm, Physics 3, 9 (2010) – Published January 25, 2010
A prediction that resonantly interacting particles can form weakly bound trimer states remained a mere theoretical oddity for more than three decades until tunable ultracold gases caused the field to explode, with enormous progress in just the last year.
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Nearly perfect fluidity

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Thomas Schäfer, Physics 2, 88 (2009) – Published October 26, 2009
Is there a fundamental lower bound on viscosity? To answer this question, we can look at the coldest and hottest fluids that laboratories are able to produce.