Coherent oscillations in a superconducting tunable flux qubit manipulated without microwaves

被引：42

作者：

Poletto, S. ^{[1
]}

Chiarello, F. ^{[2
]}

Castellano, M. G. ^{[2
]}

Lisenfeld, J. ^{[1
]}

Lukashenko, A. ^{[1
]}

Cosmelli, C. ^{[3
]}

Torrioli, G. ^{[2
]}

Carelli, P. ^{[4
]}

Ustinov, A. V. ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Phys, D-76131 Karlsruhe, Germany

[2] CNR, Ist Foton & Nanotecnol, I-00156 Rome, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[4] Univ Aquila, Dipartimento Ingn Elettr, I-67040 Monteluco, Italy

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

MACROSCOPIC QUANTUM STATES; PAIR;

D O I：

10.1088/1367-2630/11/1/013009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate coherent oscillations of a tunable superconducting flux qubit by manipulating its energy potential with a nanosecond-long pulse of magnetic flux. The occupation probabilities of two persistent current states oscillate at a frequency ranging from 6 GHz to 21 GHz, tunable by changing the amplitude of the flux pulse. The demonstrated operation mode could allow quantum gates to be realized in less than 100 ps, which is much shorter than gate times attainable in other superconducting qubits. Another advantage of this type of qubit is its immunity to both thermal and magnetic field fluctuations.

引用

页数：10

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