Entangling flux qubits with a bipolar dynamic inductance

被引：94

作者：

Plourde, BLT ^{[1
]}

Zhang, J

Whaley, KB

Wilhelm, FK

Robertson, TL

Hime, T

Linzen, S

Reichardt, PA

Wu, CE

Clarke, J

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[4] Univ Munich, Dept Phys, D-80333 Munich, Germany

[5] Univ Munich, CeNS, D-80333 Munich, Germany

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.70.140501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.

引用

页码：140501 / 1

页数：4

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