Quantum Interference and Coherent Population Trapping in a Double Quantum Dot
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 nondriven situations. We further show that CPT in a driven DQD could be used to generate adiabatic state transfer. Moreover, our experiment reveals a nontrivial modulation to the CPT caused by the longitudinal driving field, yielding an odd-even effect and a tunable CPT. Our results broaden the field of CPT, and open up the possibility of quantum simulation and quantum computation based on adiabatic passage in quantum dot systems.
Authors
- Gang Xu (ORCID: https://orcid.org/0000-0002-4718-0681)
- Gang Cao (ORCID: https://orcid.org/0000-0002-3599-5496)
- Guang‐Can Guo (ORCID: https://orcid.org/0000-0003-3771-9185)
- Yuan Zhou (ORCID: https://orcid.org/0000-0002-3103-5535)
- Hai-Ou Li (ORCID: https://orcid.org/0000-0002-9898-4735)
- Rong-Long Ma
- Guo‐Ping Guo (ORCID: https://orcid.org/0000-0002-2179-9507)
- He Liu (ORCID: https://orcid.org/0000-0002-8658-2851)
- Jianjun Zhang (ORCID: https://orcid.org/0000-0001-7872-3477)
- Ke Wang (ORCID: https://orcid.org/0000-0003-4158-8544)
- Jin Leng
- Xuedong Hu (ORCID: https://orcid.org/0000-0001-7133-804X)
- Fei Gao (ORCID: https://orcid.org/0000-0002-9598-0886)
Institutions
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Hefei University (CN)
- Origin Quantum Computing Technology Company (China) (CN)
- Institute of Physics (CN)
- University at Buffalo, State University of New York (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-08-12
- DOI
- https://doi.org/10.1021/acs.nanolett.4c01781
- Citations
- 7
- Primary Topic
- Quantum optics and atomic interactions
- Type
- article
- Field-Weighted Citation Impact
- 2.36
Funders
- National Natural Science Foundation of China
- Ministry of Science and Technology of the People's Republic of China
- Natural Science Foundation of Anhui Province
- USTC Center for Micro- and Nanoscale Research and Fabrication
- Army Research Office