Josephson-phase qubit without tunneling

被引：64

作者：

Amin, MHS ^{[1
]}

Smirnov, AY ^{[1
]}

van den Brink, AM ^{[1
]}

机构：

[1] D Wave Syst Inc, Vancouver, BC V6J 4Y3, Canada

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.67.100508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that a complete set of one-bit gates can be realized by coupling the two logical states of a phase qubit to a third level (at higher energy) using microwave pulses. Thus, one can achieve coherent control without invoking any tunneling between the qubit levels. We propose two implementations, using rf-SQUIDs and d-wave Josephson junctions.

引用

收藏

页数：4

相关论文

共 25 条

[1] Quasiclassical theory of spontaneous currents at surfaces and interfaces of d-wave superconductors [J].

Amin, MHS ;

Omelyanchouk, AN ;

Rashkeev, SN ;

Coury, M ;

Zagoskin, AM .

PHYSICA B-CONDENSED MATTER, 2002, 318 (2-3) :162-179

[2] Mechanisms of spontaneous current generation in an inhomogeneous d-wave superconductor -: art. no. 212502 [J].

Amin, MHS ;

Omelyanchouk, AN ;

Zagoskin, AM .

PHYSICAL REVIEW B, 2001, 63 (21)

[3] Macroscopic resonant tunneling of magnetic flux [J].

Averin, DV ;

Friedman, JR ;

Lukens, JE .

PHYSICAL REVIEW B, 2000, 62 (17) :11802-11811

[4]

BARONE A, CONDMAT0203038

[5] Tunable coupling of superconducting qubits [J].

Blais, A ;

van den Brink, AM ;

Zagoskin, AM .

PHYSICAL REVIEW LETTERS, 2003, 90 (12) :4

[6] Operation of universal gates in a solid-state quantum computer based on clean Josephson junctions between d-wave superconductors -: art. no. 042308 [J].

Blais, A ;

Zagoskin, AM .

PHYSICAL REVIEW A, 2000, 61 (04) :4

[7] TUNNEL-JUNCTIONS OF UNCONVENTIONAL SUPERCONDUCTORS [J].

BRUDER, C ;

VANOTTERLO, A ;

ZIMANYI, GT .

PHYSICAL REVIEW B, 1995, 51 (18) :12904-12907

[8] Ammonia-based quantum computer [J].

Ferguson, AJ ;

Cain, PA ;

Williams, DA ;

Briggs, GAD .

PHYSICAL REVIEW A, 2002, 65 (03) :1-20

[9] Aharonov-Casher-effect suppression of macroscopic tunneling of magnetic flux [J].

Friedman, JR ;

Averin, DV .

PHYSICAL REVIEW LETTERS, 2002, 88 (05) :4

[10]

GOLUBOV A, COMMUNICATION, P35416