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Generating Giant and Tunable Nonlinearity in a Macroscopic Mechanical Resonator from Chemical Bonding Force

zqyin 添加于 2015-6-25 11:19 | 974 次阅读 | 0 个评论

作者
Huang P, Zhou J, Zhang L, Hou D, Deng W, Meng C, Duan C, Ju C, Zheng X, Xue F, Du J
摘要
Nonlinearity in macroscopic mechanical system plays a crucial role in a wide variety of applications, including signal transduction and processing, synchronization, and building logical devices. However, it is difficult to generate nonlinearity due to the fact that macroscopic mechanical systems follow the Hooke\'s law and response linearly to external force, unless strong drive is used. Here we propose and experimentally realize a record-high nonlinear response in macroscopic mechanical system by exploring the anharmonicity in deforming a single chemical bond. We then demonstrate the tunability of nonlinear response by precisely controlling the chemical bonding interaction, and realize a cubic elastic constant of mathversion{bold}$2 times 10^{18}~{rm N}/{rm m^3}$, many orders of magnitude larger in strength than reported previously. This enables us to observe vibrational bistate transitions of the resonator driven by the weak Brownian thermal noise at 6~K. This method can be flexibly applied to a variety of mechanical systems to improve nonlinear responses, and can be used, with further improvements, to explore macroscopic quantum mechanics.
详细资料
- 关键词: quant-ph; cond-mat.mes-hall
- 文献种类: Manual Script
- 期卷页: 2015年
- 日期: 2015-6-24
- 发布方式: arXiv e-prints
- 备注:arXiv:1506.07227v1
学科领域自然科学 » 物理学
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