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。由于声子是电子器件中退相和耗散的重要来源，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，非热声声子也有许多应用。实例包括基于表面声波的声电开关、基于声子超材料的声学二极管或超灵敏纳米机械质量传感器。在这个计划中，我们的目标是利用声子在纳米电子量子电路，工程师的电子-声子动力学，基于受限声子和受限电子的混合量子系统的前景的指导下。我们建议工程师声子与电子合作，作为固体中的相干激发。这些激发可以用量子信息编码，声子可以作为固态量子比特之间的互连。 在这里，我们将在这个方向上执行的第一步，实现混合量子系统耦合电子和声子在定制的纳米结构。我们的重点将放在电子耦合的量子点放置在高品质的声子共振器，旨在达到强耦合制度的电子-声子相互作用。在这种器件中，单个电子和单个声子之间的相干相互作用将产生对量子信息应用有用的量子杂化态。