Realization of controllable interaction between distant qubits is one of the major problems in scalable solid state quantum computing. We study a superconducting transmission line resonator (TLR) as a tunable dispersive coupler for the double-dot molecules. A general interaction Hamiltonian of n two-electron spin-based qubits and the TLR is presented, where the double-dot qubits are biased at the large detuning region and the TLR is always empty and virtually excited. Our analysis o the main decoherence sources indicates that various major quantum operations can be reliably implemented with current technology.
@article{arxiv.0802.1308,
title = {Dispersive Coupling Between the Superconducting Transmission Line Resonator and the Double Quantum Dots},
author = {Guo-Ping Guo and Hui Zhang and Yong Hu and Tao Tu and Guang-Can Guo},
journal= {arXiv preprint arXiv:0802.1308},
year = {2008}
}