Fast reset and suppressing spontaneous emission of a superconducting qubit

被引：232

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

共 25 条

[1] Randomized Benchmarking and Process Tomography for Gate Errors in a Solid-State Qubit [J].

Chow, J. M. ;

Gambetta, J. M. ;

Tornberg, L. ;

Koch, Jens ;

Bishop, Lev S. ;

Houck, A. A. ;

Johnson, B. R. ;

Frunzio, L. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW LETTERS, 2009, 102 (09)

[2]

CHOW JM, ARXIV09081955

[3] Demonstration of two-qubit algorithms with a superconducting quantum processor [J].

DiCarlo, L. ;

Chow, J. M. ;

Gambetta, J. M. ;

Bishop, Lev S. ;

Johnson, B. R. ;

Schuster, D. I. ;

Majer, J. ;

Blais, A. ;

Frunzio, L. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

NATURE, 2009, 460 (7252) :240-244

[4] EFFECT OF AN ARBITRARY DISSIPATIVE CIRCUIT ON THE QUANTUM ENERGY-LEVELS AND TUNNELING OF A JOSEPHSON JUNCTION [J].

ESTEVE, D ;

DEVORET, MH ;

MARTINIS, JM .

PHYSICAL REVIEW B, 1986, 34 (01) :158-163

[5] Two-Qubit State Tomography Using a Joint Dispersive Readout [J].

Filipp, S. ;

Maurer, P. ;

Leek, P. J. ;

Baur, M. ;

Bianchetti, R. ;

Fink, J. M. ;

Goeppl, M. ;

Steffen, L. ;

Gambetta, J. M. ;

Blais, A. ;

Wallraff, A. .

PHYSICAL REVIEW LETTERS, 2009, 102 (20)

[6] Protocols for optimal readout of qubits using a continuous quantum nondemolition measurement [J].

Gambetta, Jay ;

Braff, W. A. ;

Wallraff, A. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW A, 2007, 76 (01)

[7] OBSERVATION OF CAVITY-ENHANCED SINGLE-ATOM SPONTANEOUS EMISSION [J].

GOY, P ;

RAIMOND, JM ;

GROSS, M ;

HAROCHE, S .

PHYSICAL REVIEW LETTERS, 1983, 50 (24) :1903-1906

[8] Controlling the spontaneous emission of a superconducting transmon qubit [J].

Houck, A. A. ;

Schreier, J. A. ;

Johnson, B. R. ;

Chow, J. M. ;

Koch, Jens ;

Gambetta, J. M. ;

Schuster, D. I. ;

Frunzio, L. ;

Devoret, M. H. ;

Girvin, S. M. ;

Schoelkopf, R. J. .

PHYSICAL REVIEW LETTERS, 2008, 101 (08)

[9] INHIBITED SPONTANEOUS EMISSION BY A RYDBERG ATOM [J].

HULET, RG ;

HILFER, ES ;

KLEPPNER, D .

PHYSICAL REVIEW LETTERS, 1985, 55 (20) :2137-2140

[10] SUPPRESSION OF SPONTANEOUS DECAY AT OPTICAL FREQUENCIES - TEST OF VACUUM-FIELD ANISOTROPY IN CONFINED SPACE [J].

JHE, W ;

ANDERSON, A ;

HINDS, EA ;

MESCHEDE, D ;

MOI, L ;

HAROCHE, S .

PHYSICAL REVIEW LETTERS, 1987, 58 (07) :666-669

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