Yoni Shalibo, Rofe, Ya'ara , Shwa, David , Zeides, Felix , Neeley, Matthew , Martinis, John M, and Katz, Nadav . 2010. “Lifetime And Coherence Of Two-Level Defects In A Josephson Junction”. Physical Review Letters, 105, Pp. 177001. doi:10.1103/PhysRevLett.105.177001.