Calsamiglia, JohnMackie, MattSuominen, Kalle-Antti2004-12-032004-12-0320012001http://hdl.handle.net/2003/129610.17877/DE290R-11094enThe American Physical SocietyPhysical Review Letters530Superposition of Macroscopic Numbers of Atoms and Molecules10.1103/PhysRevLett.87.160403article (journal)