Michel H. Devoret:
Department of Applied Physics, Yale University, New Haven, CT, USA
Collège de France, 11 Place Marcelin Berthelot, Paris, France
; Benjamin Huard:
Laboratoire Pierre Aigrain, CNRS, Ecole Normale Supérieure, Paris, France
; Robert Schoelkopf:
Department of Applied Physics, Yale University, New Haven, CT, USA
; Leticia F. Cugliandolo:
Laboratoire de Physique Theorique et Hautes Energies
Universite Pierre et Marie Curie - Paris 6, Paris, France