The Loss of fidelity due to quantum leakage for Josephson charge qubits
Quantum Physics
2009-11-10 v1
Abstract
In this paper we calculate the loss of fidelity due to quantum leakage for the Josephson charge qubit (JCQ) in virtue of the Mathieu functions. It is shown that for an present typical parameters of JCQ E_{J}/E_{ch}~0.02, the loss of the fidelity per elementary operation is about 10^(-4) which satisfy the DiVincenzo's low decoherence criterion. By appropriately improving the design of the Josephson junction, namely, decreasing E_{J}/E_{ch} to 0.01, the loss of fidelity per elementary operation can decrease to 10^(-6) even smaller.
Keywords
Cite
@article{arxiv.quant-ph/0407027,
title = {The Loss of fidelity due to quantum leakage for Josephson charge qubits},
author = {Xian-Ting Liang and Yong-Jian Xiong},
journal= {arXiv preprint arXiv:quant-ph/0407027},
year = {2009}
}
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6 pages