Squeezed states of magnons and phonons in cavity magnomechanics

被引：242

作者：

Li, Jie ^{[1
,2
,3
]}

Zhu, Shi-Yao ^{[1
]}

Agarwal, G. S. ^{[2
,3
,4
]}

机构：

[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[2] Texas A&M Univ, Inst Quantum Sci & Engn, College Stn, TX 77843 USA

[3] Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77843 USA

[4] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

来源：

PHYSICAL REVIEW A | 2019年 / 99卷 / 02期

关键词：

QUANTUM; AMPLIFICATION; ENTANGLEMENT; NOISE; LIGHT;

D O I：

10.1103/PhysRevA.99.021801

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show how to create quantum squeezed states of magnons and phonons in a cavity magnomechanical system. The magnons are embodied by a collective motion of a large number of spins in a macroscopic ferrimagnet, and couple to cavity microwave photons and phonons (vibrational modes of the ferrimagnet) via the magnetic dipole interaction and magnetostrictive interaction, respectively. The cavity is driven by a weak squeezed vacuum field generated by a flux-driven Josephson parametric amplifier, which is essential to get squeezed states of the magnons and phonons. We show that the magnons can be prepared in a squeezed state via the cavity-magnon beam-splitter interaction, and by further driving the magnon mode with a strong red-detuned microwave field, the phonons are squeezed. We show optimal parameter regimes for obtaining large squeezing of the magnons and phonons, which are robust against temperature and could be realized with experimentally reachable parameters.

引用

页数：6

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