Spectroscopy of capacitively coupled Josephson-junction qubits
Condensed Matter
2009-11-07 v2 Quantum Physics
Abstract
We show that two capacitively-coupled Josephson junctions, in the quantum limit, form a simple coupled qubit system with effective coupling controlled by the junction bias currents. We compute numerically the energy levels and wave functions for the system, and show how these may be tuned to make optimal qubits. The dependence of the energy levels on the parameters can be measured spectroscopically, providing an important experimental test for the presence of entangled multiqubit states in Josephson-junction based circuits.
Keywords
Cite
@article{arxiv.cond-mat/0210278,
title = {Spectroscopy of capacitively coupled Josephson-junction qubits},
author = {Philip R. Johnson and Frederick W. Strauch and Alex J. Dragt and Roberto C. Ramos and C. J. Lobb and J. R. Anderson and F. C. Wellstood},
journal= {arXiv preprint arXiv:cond-mat/0210278},
year = {2009}
}
Comments
4 pages, 6 figures. Slightly Revised and final accepted version