Strong Coupling of a Quantum Oscillator to a Flux Qubit at Its Symmetry Point

被引：157

作者：

Fedorov, A. ^{[1
]}

Feofanov, A. K. ^{[1
,2
,3
]}

Macha, P. ^{[1
,4
]}

Forn-Diaz, P. ^{[1
]}

Harmans, C. J. P. M. ^{[1
]}

Mooij, J. E. ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2600 GA Delft, Netherlands

[2] Karlsruhe Inst Technol, Inst Phys, D-76131 Karlsruhe, Germany

[3] Karlsruhe Inst Technol, DFG Ctr Funct Nanostruct CFN, D-76131 Karlsruhe, Germany

[4] Inst Photon Technol, D-07702 Jena, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 06期

关键词：

23;

D O I：

10.1103/PhysRevLett.105.060503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A flux qubit biased at its symmetry point shows a minimum in the energy splitting (the gap), providing protection against flux noise. We have fabricated a qubit of which the gap can be tuned fast and have coupled this qubit strongly to an LC oscillator. We show full spectroscopy of the qubit-oscillator system and generate vacuum Rabi oscillations. When the gap is made equal to the oscillator frequency v(osc) we find the largest vacuum Rabi splitting of similar to 0:1v(osc). Here being at resonance coincides with the optimal coherence of the symmetry point.

引用

页数：4

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