Strong coupling Qubit-Oscillator System d. c. SQUID measurement lines Resonator 2C C 米 50 mK 000 Deppe et al, Nature physics 4, 686(2008) Circuit quantum electrodynamics(QED) systemStrong coupling Qubit-Oscillator System Deppe et al., Nature physics 4, 686(2008) Circuit quantum electrodynamics (QED) system