Suppressing charge noise decoherence in superconducting charge qubits

被引：416

作者：

Schreier, J. A. ^{[1
,2
]}

Houck, A. A. ^{[1
,2
]}

Koch, Jens ^{[1
,2
]}

Schuster, D. I. ^{[1
,2
]}

Johnson, B. R. ^{[1
,2
]}

Chow, J. M. ^{[1
,2
]}

Gambetta, J. M. ^{[3
,4
]}

Majer, J. ^{[1
,2
]}

Frunzio, L. ^{[1
,2
]}

Devoret, M. H. ^{[1
,2
]}

Girvin, S. M. ^{[1
,2
]}

Schoelkopf, R. J. ^{[1
,2
]}

机构：

[1] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[2] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[3] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[4] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.77.180502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an experimental realization of the transmon qubit, which is an improved superconducting charge qubit derived from the Cooper pair box. We experimentally verify the predicted exponential suppression of sensitivity to 1/f charge noise. This removes the leading source of dephasing in charge qubits which results in homogeneously broadened transitions with relaxation and dephasing times in the microsecond range. Our systematic characterization of the qubit spectrum, anharmonicity, and charge dispersion shows excellent agreement with theory.

引用

页数：4

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