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Phonon Josephson Junction with Nanomechanical Resonators

zqyin 添加于 2016-1-11 09:48 | 1232 次阅读 | 0 个评论

作者
Barzanjeh S, Vitali D
摘要
We study coherent phonon oscillations and tunneling between two coupled nonlinear nanomechanical resonators. We show that the coupling between two nanomechanical resonators creates an effective phonon Josephson junction which exhibits two different dynamical behaviors: Josephson oscillation (phonon-Rabi oscillation) and macroscopic self-trapping (phonon blockade). Self-trapping originates from mechanical nonlinearities, meaning that when the nonlinearity exceeds its critical value, the energy exchange between the two resonators is suppressed, and phonon-Josephson oscillations between them are completely blocked. An effective classical Hamiltonian for the phonon Josephson junction is derived and its mean-field dynamics is studied in phase space. Finally, we study the phonon-phonon coherence quantified by the mean fringe visibility, and show that the interaction between the two resonators may lead to the loss of coherence in the phononic junction.
详细资料
- 关键词: quant-ph
- 文献种类: Manual Script
- 期卷页: 2016年
- 日期: 2016-1-8
- 发布方式: arXiv e-prints
- 备注:arXiv:1601.01818v1; Realization of Josephson junction at nano/optomechanical resonators. Comments are welcome!
学科领域自然科学 » 物理学
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