Low-frequency measurement of the tunneling amplitude in a flux qubit -: art. no. 060501

被引：63

作者：

Grajcar, M

Izmalkov, A

Il'ichev, E

Wagner, T

Oukhanski, N

Hübner, U

May, T

Zhilyaev, I

Hoenig, HE

Greenberg, YS

Shnyrkov, VI

Born, D

Krech, W

Meyer, HG

van den Brink, AM

Amin, MHS

机构：

[1] Inst Phys High Technol, D-07702 Jena, Germany

[2] State Univ, Moscow Engn Phys Inst, Moscow 115409, Russia

[3] Univ Jena, Inst Solid State Phys, D-07743 Jena, Germany

[4] D Wave Syst Inc, Vancouver, BC V6J 4Y3, Canada

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.69.060501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have observed signatures of resonant tunneling in an Al three-junction qubit, inductively coupled to a Nb LC tank circuit. The resonant properties of the tank oscillator are sensitive to the effective susceptibility (or inductance) of the qubit, which changes drastically as its flux states pass through degeneracy. The tunneling amplitude is estimated from the data. We find good agreement with the theoretical predictions in the regime of their validity.

引用

页数：3

共 18 条

[1]

DANILOV VV, 1976, SOV PHYS-TECH PHYS, V20, P697

[2] Quantum superposition of distinct macroscopic states [J].

Friedman, JR ;

Patel, V ;

Chen, W ;

Tolpygo, SK ;

Lukens, JE .

NATURE, 2000, 406 (6791) :43-46

[3] Method for direct observation of coherent quantum oscillations in a superconducting phase qubit [J].

Greenberg, YS ;

Izmalkov, A ;

Grajcar, M ;

Il'ichev, E ;

Krech, W ;

Meyer, HG .

PHYSICAL REVIEW B, 2002, 66 (22) :1-5

[4]

GREENBERG YS, 2002, PHYS REV B, V66, P4525

[5] Continuous monitoring of Rabi oscillations in a Josephson flux qubit [J].

Il'ichev, E ;

Oukhanski, N ;

Izmalkov, A ;

Wagner, T ;

Grajcar, M ;

Meyer, HG ;

Smirnov, AY ;

van den Brink, AM ;

Amin, MHS ;

Zagoskin, AM .

PHYSICAL REVIEW LETTERS, 2003, 91 (09)

[6] Radio-frequency based monitoring of small supercurrents [J].

Il'ichev, E ;

Zakosarenko, V ;

Fritzsch, L ;

Stolz, R ;

Hoenig, HE ;

Meyer, HG ;

Götz, M ;

Zorin, AB ;

Khanin, VV ;

Pavolotsky, AB ;

Niemeyer, J .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2001, 72 (03) :1882-1887

[7]

IZMALKOV A, IN PRESS EUROPHYS LE

[8]

Landau L., 1932, Phys. Z. Sowjetunion, V2, P118, DOI DOI 10.1098/RSPA.1932.0165

[9] Quantitative study of macroscopic quantum tunneling in a dc SQUID: A system with two degrees of freedom [J].

Li, SX ;

Yu, Y ;

Zhang, Y ;

Qiu, W ;

Han, S ;

Wang, Z .

PHYSICAL REVIEW LETTERS, 2002, 89 (09)

[10] Rabi oscillations in a large Josephson-junction qubit [J].

Martinis, JM ;

Nam, S ;

Aumentado, J ;

Urbina, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (11) :1-117901

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