Coherent control of a high-orbital hole in a semiconductor quantum dot with near-unity fidelity

分类： 光学 >> 量子光学 提交时间： 2023-02-19

Junyong Yan Chen Chen Xiao-Dong Zhang Yu-Tong Wang Hans-Georg Babin Andreas D. Wieck Arne Ludwig Yun Meng Xiaolong Hu Huali Duan Wenchao Chen Wei Fang Moritz Cygorek Xing Lin Da-Wei Wang Chao-Yuan Jin Feng Liu

摘要： Coherently driven semiconductor quantum dots are one of the most promising platforms for non-classical light sources and quantum logic gates which form the foundation of photonic quantum technologies. However, to date, coherent manipulation of quantum dots is limited mainly to their lowest orbital states. Ultrafast coherent control of high-orbital states is obstructed by the demand for tunable terahertz pulses. To break this constraint, we demonstrate an all-optical method to control high-orbital states of a hole via stimulated Auger process. The coherent nature of the Auger process is revealed by Rabi oscillation and Ramsey interference with a fidelity of 95.8%. Harnessing this coherence further enables the investigation of single-hole relaxation mechanism. A surprisingly long relaxation time (156(2) ps) is observed and explained by phonon bottleneck effect. Our work opens new possibilities for understanding the fundamental properties of high-orbital states in quantum emitters and developing new types of orbital-based quantum photonic devices.

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