Spectroscopy of capacitively coupled Josephson-junction qubits

被引：47

作者：

Johnson, PR ^{[1
]}

Strauch, FW ^{[1
]}

Dragt, AJ ^{[1
]}

Ramos, RC ^{[1
]}

Lobb, CJ ^{[1
]}

Anderson, JR ^{[1
]}

Wellstood, FC ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.67.020509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：4

共 20 条

[1]

BAYFIELD JE, 1999, QUANTUM EVOLUTION

[2]

BLAIS A, CONDMAT0207112

[3] Prospects for quantum coherent computation using superconducting electronics [J].