Spectroscopy of three-particle entanglement in a macroscopic superconducting circuit

被引：45

作者：

Xu, HZ ^{[1
]}

Strauch, FW

Dutta, SK

Johnson, PR

Ramos, RC

Berkley, AJ

Paik, H

Anderson, JR

Dragt, AJ

Lobb, CJ

Wellstood, FC

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.94.027003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the quantum mechanical behavior of a macroscopic, three-body, superconducting circuit. Microwave spectroscopy on our system, a resonator coupling two large Josephson junctions, produced complex energy spectra well explained by quantum theory over a large frequency range. By tuning each junction separately into resonance with the resonator, we first observe strong coupling between each junction and the resonator. Bringing both junctions together into resonance with the resonator, we find spectroscopic evidence for entanglement between all 3 degrees of freedom and suggest a new method for controllable coupling of distant qubits, a key step toward quantum computation.

引用

页数：4

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