Overcoming correlated noise in quantum systems: How mediocre clocks make good qubits

P. J. J. O’Malley,1, ∗ J. Kelly,1, ∗ R. Barends,1, ∗ B. Campbell,1 Y. Chen,1 Z. Chen,1 B. Chiaro,1 A. Dunsworth,1 A. G. Fowler,1, 2 I.-C. Hoi,1 E. Jeffrey,1 A. Megrant,1, 3 J. Mutus,1 C. Neill,1 C. Quintana,1 P. Roushan,1 D. Sank,1 A. Vainsencher,1 J. Wenner,1 T. C. White,1 A. N. Korotkov,4 A. N. Cleland,1 and John M. Martinis1 Department of Physics, University of California, Santa Barbara, CA 93106, USA Centre for Quantum Computation and Communication Technology, School of Physics, The University of Melbourne, Victoria 3010, Australia Department of Materials, University of California, Santa Barbara, CA 93106, USA Department of Electrical and Computer Engineering, University of California, Riverside, CA 92521, USA