Fast reset and suppressing spontaneous emission of a superconducting qubit

被引：215

作者：

Reed, M. D. ^{[1
]}

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

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

DiCarlo, L. ^{[1
]}

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

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

Frunzio, L. ^{[1
]}

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

机构：

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

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 20期

关键词：

quantum communication; quantum computing; quantum electrodynamics; quantum optics; spontaneous emission; INHIBITED SPONTANEOUS EMISSION; CIRCUIT; CAVITY; PHOTON; ATOM;

D O I：

10.1063/1.3435463

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spontaneous emission through a coupled cavity can be a significant decay channel for qubits in circuit quantum electrodynamics. We present a circuit design that effectively eliminates spontaneous emission due to the Purcell effect while maintaining strong coupling to a low-Q cavity. Excellent agreement over a wide range in frequency is found between measured qubit relaxation times and the predictions of a circuit model. Using fast (nanosecond time-scale) flux biasing of the qubit, we demonstrate in situ control of qubit lifetime over a factor of 50. We realize qubit reset with 99.9% fidelity in 120 ns. (C) 2010 American Institute of Physics. [doi:10.1063/1.3435463]

引用

页数：3

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