Media type: E-Article Title: Cooperative Excitation and Many-Body Interactions in a Cold Rydberg Gas Contributor: Viteau, Matthieu; Huillery, Paul; Bason, Mark G.; Malossi, Nicola; Ciampini, Donatella; Morsch, Oliver; Arimondo, Ennio; Comparat, Daniel; Pillet, Pierre imprint: American Physical Society (APS), 2012 Published in: Physical Review Letters Language: English DOI: 10.1103/physrevlett.109.053002 ISSN: 0031-9007; 1079-7114 Keywords: General Physics and Astronomy Origination: Footnote: