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arXiv 2303.15436cond-mat.mes-hall
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驱动量子点热电子对发射的光谱学研究

Spectroscopy of hot-electron pair emission from a driven quantum dot

Jens Schulenborg, Jonathan D. Fletcher, Masaya Kataoka, Janine Splettstoesser

AI总结:

本文理论研究了交流驱动量子点中电子对发射的发射时间和能量,结合薛定谔方程数值分析与主方程方法,揭示了库仑相互作用、驱动势和量子态简并性的竞争影响,为提升单电子源对双粒子发射的控制提供指导。

摘要:

为实现飞行量子比特和量子电子光学实验,对单个电子的按需发射需要精确了解并能够调控发射时间和能量。关键的是,对于诸如驱动量子点这类受限电子源,需要理解局域库仑相互作用对这些发射特性的影响,尤其是当多个粒子在时间上接近或近乎同时发射时。本文从理论上分析了交流驱动量子点的电子对发射,详细阐述了电子-电子相互作用、形成量子点的时间依赖势以及量子态特性(如简并性)对发射时间和能量的竞争性影响。我们将驱动势中两个粒子的相干薛定谔演化的数值分析与描述强相互作用电子随机隧穿进入弱耦合导体的主方程描述相结合。这涵盖了发射粒子所受的广泛不同影响,从而为单电子源的发展提供指导,以实现对双粒子发射特性的更高控制。

英文摘要:

On-demand emission of individual electrons for the implementation of flying qubits and quantum electron-optics experiments requires precise knowledge and tunability of emission times and energies. Crucially, for confined electron sources such as driven quantum dots, the effect of local Coulomb interaction on these emission properties needs to be understood, in particular if multiple particles are emitted close in time or near-simultaneously. This paper theoretically analyzes electron-pair emission from an ac driven quantum dot, detailing the competing effects of the electron-electron interaction, the time-dependent potential forming the quantum dot, and of the quantum-state properties such as degeneracy on the emission times and energies. We complement a numerical analysis of the coherent Schrödinger evolution of two particles in a driven potential with a master-equation description for strongly interacting electrons tunneling stochastically into a weakly coupled conductor. This captures a broad range of different influences on the emitted particles and thereby guides the development of single-electron sources higher control over two-particle emission properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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