title: Collective suppression of linewidths in circuit QED.
abstract: We report the experimental observation and a theoretical explanation of collective suppression of linewidths for multiple superconducting qubits coupled to a good cavity. This demonstrates how strong qubit-cavity coupling can significantly modify the dephasing and dissipation processes that might be expected for individual qubits, and can potentially improve coherence times in many-body circuit QED.
authors.affiliation: Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: Felix
authors.initials: F
authors.lastname: Nissen
authors.affiliation: Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Johannes M
authors.initials: JM
authors.lastname: Fink
authors.affiliation: Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Jonas A
authors.initials: JA
authors.lastname: Mlynek
authors.affiliation: Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Andreas
authors.initials: A
authors.lastname: Wallraff
authors.affiliation: Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Keeling