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Nature Physics 4, 834–835 (1 November 2008) | doi:10.1038/nphys1124
Quantum many-body theory: Divide, perturb and conquer
Abstract
Physical particles tend to interact in pairs — it takes two to tango; more seems unusual. On the level of elementary particles, this is reflected in our depiction of interactions as the exchange of gauge bosons between pairs of fermions.
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