TY - GEN AU - E. Hoffmann, F. Deppe, T. Niemczyk, T. Wirth, E. P. Menzel, G. Wild, H. Huebl, M. Mariantoni, T. Weissl, A. Lukashenko, A. P. Zhuravel, A. V. Ustinov, A. Marx, R. Gross T1 - A superconducting 180 degrees hybrid ring coupler for circuit quantum electrodynamics CY - PY - 2010 PB - T3 - Applied Physics Letters VL - 97 UR - http://dx.doi.org/10.1063/1.3522650 SN - 0003-6951