Kempe, J.Nielsen, M. A.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1895210.17877/DE290R-1702enThe American Physical SocietyPhysical Review Letters530Interdisciplinary Physics: Biological Physics, Quantum Information, etc.10.1103/PhysRevLett.86.5184article (journal)