Controlling Electron-Phonon Interaction in Nanocircuits Strong Coupling Regime

控制纳米电路强耦合机制中的电子-声子相互作用

• 批准号: 405619279
• 负责人: Privatdozent Dr. Stefan Ludwig
• 金额: --
• 依托单位: Paul-Drude-Institut für Festkörperelektronik (PDI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/405619279?language=en
• 关键词: Controlling; Electron; Phonon; Interaction; Nanocircuits

Phonons are the most fundamental excitations in condensed matter. Phonons strongly interact and the electron-phonon interaction has important consequences for technologically relevant applications. Because phonons are an important source of dephasing and dissipation in electronic devices, they present major challenges for current information technology and future quantum technology applications. In the mean time, there exist a number of applications based on non-thermal acoustic phonons. Examples include acousto-electrical switches based on surface acoustic waves, acoustic diodes based on phononic metamaterials or ultra sensitive nanomechanical mass sensors. In this proposal we aim at utilizing phonons in nanoelectronical quantum circuits, to engineer the electron-phonon dynamics, guided by the prospect of hybrid quantum systems based on confined phonons and confined electrons. We propose to engineer phonons in cooperation with electrons as coherent excitations in solids. Theseexcitations could be encoded with quantum information and phonons could serve, for instance, as interconnects between solid state qubits. Here we will perform a first step in this direction by realizing hybrid quantum systems coupling electrons and phonons in tailored nanostructures. Our focus will be on the electron-phonon interaction in few electron coupled quantum dots placed in high quality phonon resonators aiming at reaching the strong coupling regime. The coherent interaction between a single electron and a single phonon in such a device will give rise to quantum hybrid states useful for quantum information applications.

声子是凝聚态物质中最基本的激发态。声子强烈相互作用，电子-声子相互作用对技术相关应用具有重要影响。由于声子是电子设备中相移和耗散的重要来源，因此它们对当前的信息技术和未来的量子技术应用提出了重大挑战。与此同时，存在许多基于非热声声子的应用。例子包括基于表面声波的声电开关、基于声子超材料的声二极管或超灵敏纳米机械质量传感器。在本提案中，我们的目标是在纳米电子量子电路中利用声子，以基于受限声子和受限电子的混合量子系统的前景为指导来设计电子-声子动力学。我们建议将声子与电子配合设计为固体中的相干激发。这些激发可以用量子信息进行编码，声子可以用作固态量子位之间的互连。 在这里，我们将通过实现在定制纳米结构中耦合电子和声子的混合量子系统来朝着这个方向迈出第一步。我们的重点将放在高质量声子谐振器中的少数电子耦合量子点中的电子-声子相互作用，以达到强耦合状态。这种设备中单个电子和单个声子之间的相干相互作用将产生可用于量子信息应用的量子混合态。