@article{Baust:56144, author = "Baust, A. and Hoffmann, E. and Haeberlein, M. and Schwarz, M.J. and Eder, P. and Goetz, J. and Wulschner, F. and Xie, E. and Zhong, L. and Quijandría, F. and Zueco, D. and Ripoll, J.J G. and García-Álvarez, L. and Romero, G. and Solano, E. and Fedorov, K.G. and Menzel, E.P. and Deppe, F. and Marx, A. and Gross, R.", title = "{Ultrastrong coupling in two-resonator circuit QED}", year = "2016", }