We propose a scenario to physically implement a kind of topologically decoherence-protected qubit using superconducting devices coupled to a micro-wave cavity mode with unconventional geometric operations. It is shown that the two needed interactions for selective devices, which are required for implementing such protected qubits, as well as single-qubit gates, can be achieved by using the external magnetic flux. The easy combination of individual addressing with the many-device setup proposed in the system presents a distinct merit in comparison with the implementation of topologically protected qubits in a trapped-ion system.
@article{arxiv.0710.2407,
title = {Physical implementation of topologically decoherence-protected superconducting qubits},
author = {Zheng-Yuan Xue and Z. D. Wang and Shi-Liang Zhu},
journal= {arXiv preprint arXiv:0710.2407},
year = {2008}
}
Comments
v3 submitted version. v4 accepted version, modified presentation, figure 2 added, conclusion removed for length's sake. To appear in Phys. Rev. A