Strong coupling of spin qubits to a transmission line resonator
  We propose a mechanism for coupling spin qubits formed in double quantum dots to a superconducting transmission line resonator. Coupling the resonator to the gate controlling the interdot tunneling creates a strong spin qubit--resonator interaction with strength of tens of MHz. This mechanism allows operating the system at a point of degeneracy where dephasing is minimized. The transmission line can serve as a shuttle allowing for two-qubit operations, including fast generation of qubit-qubit entanglement and the implementation of a controlled-phase gate. 
Pei-Qing Jin, Michael Marthaler, Alexander Shnirman, Gerd Sch\"on
cond-mat.mes-hall