Quantum nondemolition readout using a Josephson bifurcation amplifier

被引：42

作者：

Boulant, N. ^{[1
]}

Ithier, G.

Meeson, P.

Nguyen, F.

Vion, D.

Esteve, D.

Siddiqi, I.

Vijay, R.

Rigetti, C.

Pierre, F.

机构：

[1] CEA Saclay, Quantron Grp, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

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

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.76.014525

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an experiment on the determination of the quantum nondemolition (QND) nature of a readout scheme of a quantum electrical circuit. The circuit is a superconducting quantum bit measured by microwave reflectometry using a Josephson bifurcation amplifier. We perform a series of two subsequent measurements, record their values and correlation, and quantify the QND character of this readout.

引用

页数：6

共 18 条

[1]

Braginskii V. B., 1975, Soviet Physics - Uspekhi, V17, P644, DOI 10.1070/PU1975v017n05ABEH004362

[2]

Braginsky V. B., 1992, Quantum Measurement

[3] NMR-like control of a quantum bit superconducting circuit [J].

Collin, E ;

Ithier, G ;

Aassime, A ;

Joyez, P ;

Vion, D ;

Esteve, D .

PHYSICAL REVIEW LETTERS, 2004, 93 (15) :157005-1

[4]

Cottet A., 2002, Implementation of a quantum bit in a superconducting circuit

[5] Decoherence from spin environments [J].

Cucchietti, FM ;

Paz, JP ;

Zurek, WH .

PHYSICAL REVIEW A, 2005, 72 (05)

[6] Critical exponents in metastable decay via quantum activation [J].

Dykman, M. I. .

PHYSICAL REVIEW E, 2007, 75 (01)

[7] Decoherence in a superconducting quantum bit circuit -: art. no. 134519 [J].

Ithier, G ;

Collin, E ;

Joyez, P ;

Meeson, PJ ;

Vion, D ;

Esteve, D ;

Chiarello, F ;

Shnirman, A ;

Makhlin, Y ;

Schriefl, J ;

Schön, G .

PHYSICAL REVIEW B, 2005, 72 (13)

[8]

ITHIER G, 2005, THESIS U PARIS 6

[9]

Landau L D., 1981, Mechanics, V3rd edn

[10] Quantum non-demolition measurement of a superconducting two-level system [J].

Lupascu, A. ;

Saito, S. ;

Picot, T. ;

De Groot, P. C. ;

Harmans, C. J. P. M. ;

Mooij, J. E. .

NATURE PHYSICS, 2007, 3 (02) :119-123

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