A Superconducting Persistent Current Qubit
Condensed Matter
2009-10-31 v2 Quantum Physics
Abstract
We present the design of a superconducting qubit that has circulating currents of opposite sign as its two states. The circuit consists of three nano-scale aluminum Josephson junctions connected in a superconducting loop and controlled by magnetic fields. The advantages of this qubit are that it can be made insensitive to background charges in the substrate, the flux in the two states can be detected with a SQUID, and the states can be manipulated with magnetic fields. Coupled systems of qubits are also discussed as well as sources of decoherence.
Cite
@article{arxiv.cond-mat/9908283,
title = {A Superconducting Persistent Current Qubit},
author = {T. P. Orlando and J. E. Mooji and Lin Tian and Caspar H. van der Wal and L. Levitov and Seth Lloyd and J. J. Mazo},
journal= {arXiv preprint arXiv:cond-mat/9908283},
year = {2009}
}
Comments
15 pages. Updated ref.[17]: Science 285, 1036 (1999)