Controlling the spontaneous emission of a superconducting transmon qubit

被引：370

作者：

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

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

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

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

Koch, Jens ^{[1
]}

Gambetta, J. M. ^{[2
,3
]}

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

Frunzio, L. ^{[1
]}

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

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

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

机构：

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.101.080502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a detailed characterization of coherence in seven transmon qubits in a circuit QED architecture. We find that spontaneous emission rates are strongly influenced by far off-resonant modes of the cavity and can be understood within a semiclassical circuit model. A careful analysis of the spontaneous qubit decay into a microwave transmission-line cavity can accurately predict the qubit lifetimes over 2 orders of magnitude in time and more than an octave in frequency. Coherence times T-1 and T-2(*) of more than a microsecond are reproducibly demonstrated.

引用

页数：4

共 30 条

[1] Single-shot measurement of the Josephson charge qubit [J].