Quantum Interference and Coherent Population Trapping in a Double Quantum Dot
Abstract
Quantum interference is a natural consequence of wave-particle duality in quantum mechanics, and is widely observed at the atomic scale. One interesting manifestation of quantum interference is coherent population trapping (CPT), first proposed in three-level driven atomic systems and observed in quantum optical experiments. Here, we demonstrate CPT in a gate-defined semiconductor double quantum dot (DQD), with some unique twists as compared to the atomic systems. Specifically, we observe CPT in both driven and non-driven situations. We further show that CPT in a driven DQD could be used to generate adiabatic state transfer. Moreover, our experiment reveals a non-trivial modulation to the CPT caused by the longitudinal driving field, yielding an odd-even effect and a tunable CPT.
Keywords
Cite
@article{arxiv.2209.14528,
title = {Quantum Interference and Coherent Population Trapping in a Double Quantum Dot},
author = {Yuan Zhou and Ke Wang and He Liu and Gang Cao and Guang-Can Guo and Xuedong Hu and Hai-Ou Li and Guo-Ping Guo},
journal= {arXiv preprint arXiv:2209.14528},
year = {2022}
}
Comments
8 pages, 4 figures