Mechanical dissipation and phonon-induced decoherence in nanomechanical and optomechanical systems

纳米机械和光机械系统中的机械耗散和声子引起的退相干

• 批准号: 204526181
• 负责人: Dr. Ignacio Wilson-Rae
• 金额: --
• 依托单位: Arbeitsgruppe Vielteilchenphänomene
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/204526181?language=en
• 关键词: Mechanical; dissipation; phonon; induced; decoherence

State of the art opto- and nano-mechanical setups are close to allowing for the observation of quantum effects in a ‘macroscopic’ mechanical system. This will both, further the investigation of foundational issues in quantum physics and provide promising alternatives for technological applications, for instance in the detection of magnetization at the single spin level. A major challenge in this context is to understand and control mechanical dissipation in these systems. This applies, in particular, to ‘atomic-sized’ nanomechanical structures such as carbon nanotubes, which are emerging as ideal candidates for the coherent control of localized electronic degrees of freedom by electrical and optical means. A fundamental issue in such low dimensional solid-state systems is how phonon-induced decoherence limits their performance. This project will address current open problems concerning the mechanical dissipation and phonon-induced decoherence in suspended nanostructures. Specifically, we will study the role of stress in the internal dissipation of nanomechanical resonators and the role of phonon confinement in the decoherence of embedded two-level photon emitters using an extended spin-boson model.

最先进的光学和纳米机械装置几乎可以在“宏观”机械系统中观察量子效应。这将进一步研究量子物理学的基础问题，并为技术应用提供有前途的替代方案，例如在单自旋水平的磁化强度检测中。在这种情况下的一个主要挑战是理解和控制这些系统中的机械耗散。这尤其适用于碳纳米管等“原子大小”的纳米机械结构，它们正在成为通过电学和光学手段相干控制局部电子自由度的理想候选者。这种低维固态系统的一个基本问题是声子引起的退相干如何限制其性能。该项目将解决当前悬而未决的问题，涉及悬浮纳米结构中的机械耗散和声子引起的退相干。具体来说，我们将使用扩展的自旋玻色子模型研究应力在纳米机械谐振器内部耗散中的作用以及声子限制在嵌入式两级光子发射器退相干中的作用。

项目成果

Nonlinear nanomechanical resonators for quantum optoelectromechanics

• DOI: 10.1103/physreva.89.013854
• 发表时间: 2012-06
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: S. Rips;I. Wilson-Rae;I. Wilson-Rae;Michael J. Hartmann

Approaching intrinsic performance in ultra-thin silicon nitride drum resonators

• DOI: 10.1063/1.4754576
• 发表时间: 2012-09
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: V. Adiga;B. Ilic;Robert A. Barton;I. Wilson-Rae;H. Craighead;J. Parpia

Exciton-assisted optomechanics with suspended carbon nanotubes

• DOI: 10.1088/1367-2630/14/11/115003
• 发表时间: 2009-11
• 期刊: New Journal of Physics
• 影响因子: 3.3
• 作者: I. Wilson-Rae;C. Galland;W. Zwerger;A. Imamoğlu