rf-SQUID-Mediated Coherent Tunable Coupling between a Superconducting Phase Qubit and a Lumped-Element Resonator

被引：81

作者：

Allman, M. S. ^{[1
]}

Altomare, F. ^{[1
]}

Whittaker, J. D. ^{[1
]}

Cicak, K. ^{[1
]}

Li, D. ^{[1
]}

Sirois, A. ^{[1
]}

Strong, J. ^{[1
]}

Teufel, J. D. ^{[1
]}

Simmonds, R. W. ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 17期

关键词：

CHARGE QUBITS; CAVITY;

D O I：

10.1103/PhysRevLett.104.177004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate coherent tunable coupling between a superconducting phase qubit and a lumped-element resonator. The coupling strength is mediated by a flux-biased rf SQUID operated in the nonhysteretic regime. By tuning the applied flux bias to the rf SQUID we change the effective mutual inductance, and thus the coupling energy, between the phase qubit and resonator. We verify the modulation of coupling strength from 0 to 100 MHz by observing modulation in the size of the splitting in the phase qubit's spectroscopy, as well as coherently by observing modulation in the vacuum Rabi oscillation frequency when on resonance. The measured spectroscopic splittings and vacuum Rabi oscillations agree well with theoretical predictions.

引用

页数：4

共 28 条

[1]

ALLMAN MS, ARXIV10042738V1

[2] Interqubit coupling mediated by a high-excitation-energy quantum object [J].