Collective Coupling of a Macroscopic Number of Single-Molecule Magnets with a Microwave Cavity Mode

被引：25

作者：

Eddins, A. W. ^{[1
]}

Beedle, C. C. ^{[2
]}

Hendrickson, D. N. ^{[2
]}

Friedman, Jonathan R. ^{[1
]}

机构：

[1] Amherst Coll, Dept Phys, Amherst, MA 01002 USA

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 12期

基金：

美国国家科学基金会;

关键词：

QUANTUM-DOT; PHOTON; QUBIT;

D O I：

10.1103/PhysRevLett.112.120501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of strong coupling of a macroscopic ensemble of similar to 10(16) Fe-8 molecular nanomagnets to the resonant mode of a microwave cavity. We use millimeter-wave spectroscopy to measure the splitting of the system's resonant frequency induced by the coupling between the spins and the cavity mode. The magnitude of this splitting is found to scale with root N, where N is the number of collectively coupled spins. We control N by changing the system's temperature and, thereby, the populations of the relevant spin energy levels. Strong coupling is observed for two distinct transitions between spin energy states. Our results indicate that at low temperatures nearly all of the spins in the sample couple with the cavity's resonant mode even though there is substantial inhomogeneous broadening of the Fe-8 spin resonances.

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页数：5

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