Conditional gate operation in superconducting charge qubits

Yamamoto, T. and Pashkin, Yu A. and Astafiev, O. and Nakamura, Y. and Tsai, J. S. (2006) Conditional gate operation in superconducting charge qubits. In: Quantum Computing in Solid State Systems. Springer New York LLC, pp. 10-18. ISBN 0387263322

Abstract

A variety of Josephson-junction-based qubits have recently been implemented with remarkable progress in coherence time and read-out scheme. These developments, together with its potential scalability, have renewed the position of this solid-state device as a strong candidate as a building block for the quantum computer. On the other hand, coupling multiple qubits to construct a logic gate is another important step toward the realization of quantum computer. In this paper, we present our experiments on conditional gate operations using coupled superconducting charge qubits.