Quantum Interference and Coherent Population Trapping in a Double Quantum Dot

• URL: http://arxiv.org/abs/2209.14528v1
• Date: Thu, 29 Sep 2022 03:18:24 GMT
• Title: Quantum Interference and Coherent Population Trapping in a Double Quantum Dot
• Authors: Yuan Zhou, Ke Wang, He Liu, Gang Cao, Guang-Can Guo, Xuedong Hu, Hai-Ou Li and Guo-Ping Guo
• Abstract summary: coherent population trapping (CPT) is first proposed in three-level driven atomic systems. We demonstrate CPT in a gate-defined semiconductor double quantum dot (DQD) We show that CPT in a driven DQD could be used to generate adiabatic state transfer.
• Score: 12.33273853798096
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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