https://doi.org/10.1140/epjd/e2012-30394-7
Regular Article
Quantum gate operations in hybrid superconducting circuit
Laboratory of Nanophotonic Functional Materials and
Devices, SIPSE & LQIT, South China Normal University,
Guangzhou
510006, P.R.
China
a e-mail: wchq2005tj@163.com
Received:
23
June
2012
Received in final form:
19
September
2012
Published online:
4
December
2012
We propose several schemes for quantum gate operations in the hybrid superconducting circuit. In these schemes, the gate operations can be easily carried out by adjusting some parameters. The advantage of our scheme can be shown by a particular structure design, which includes a large Josephson-junction coupling between two charge qubits and a crossing current coupling between two charge qubits and a flux qubit. Using our proposal, the pure σxσx coupling can be conveniently implemented for generating quantum phase gates. Moreover, since both charge qubits and flux qubit can be adjusted to work at the degeneracy points, these gate operations can greatly suppress charge noise and flux fluctuation.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012
