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.
@article{arxiv.1112.0869,
title = {Strong coupling of spin qubits to a transmission line resonator},
author = {Pei-Qing Jin and Michael Marthaler and Alexander Shnirman and Gerd Schön},
journal= {arXiv preprint arXiv:1112.0869},
year = {2012}
}