Coupled Josephson qubits: Characterization of low-frequency charge noise A. Mastellone, A. D'Arrigo, E. Paladino and G. Falci Eur. Phys. J. Special Topics, 160 (2008) 291-300 Published online: 18 June 2008 DOI: 10.1140/epjst/e2008-00732-9