We combine the ideas of qubit encoding and dispersive dynamics to enable robust and easy quantum information processing (QIP) on paired superconducting charge boxes sharing a common bias lead. We establish a decoherence free subspace on these and introduce universal gates by dispersive interaction with a LC resonator and inductive couplings between the encoded qubits. These gates preserve the code space and only require the established local symmetry and the control of the voltage bias.
@article{arxiv.cond-mat/0307393,
title = {Dispersive Manipulation of Paired Superconducting Qubits},
author = {Xingxiang Zhou and Michael Wulf and Zhengwei Zhou and Guangcan Guo and Marc J. Feldman},
journal= {arXiv preprint arXiv:cond-mat/0307393},
year = {2009}
}