One-Dimensional Quantum Dot Array Integrated with Charge Sensors in an InAs Nanowire
We report an experimental study of a 1D quintuple-quantum-dot array integrated with two charge sensors in an InAs nanowire. The device is studied by measuring double quantum dots formed consecutively in the array, and corresponding charge stability diagrams are revealed with both direct current measurements and charge sensor signals. The one-dimensional quintuple-quantum-dot array is then tuned up, and its charge configurations are fully mapped out with the two charge sensors. The energy level of each dot in the array can be controlled individually using virtual gates. After that, four dots in the array are selected to form two double quantum dots, and ultrastrong inter-double-dot interaction is obtained. A theoretical simulation confirms the strong coupling strength between the two double quantum dots. The highly controllable one-dimensional quantum dot array is expected to be valuable for employing InAs nanowires to construct advanced quantum hardware in the future.
Authors
- Dong Pan (ORCID: https://orcid.org/0000-0003-2067-6983)
- Shili Yan (ORCID: https://orcid.org/0000-0002-9733-2137)
- Yi Luo (ORCID: https://orcid.org/0000-0003-1418-785X)
- Haitian Su (ORCID: https://orcid.org/0000-0001-5400-0071)
- H. Q. Xu (ORCID: https://orcid.org/0000-0001-6434-2569)
- Ji‐Yin Wang (ORCID: https://orcid.org/0000-0001-6783-7217)
- Xiao-Fei Liu (ORCID: https://orcid.org/0009-0005-8678-4401)
- Weijie Li (ORCID: https://orcid.org/0000-0002-4021-536X)
- Jianhua Zhao (ORCID: https://orcid.org/0000-0003-2269-3963)
- Zhi-Hai Liu (ORCID: https://orcid.org/0000-0002-9031-7110)
- Han Gao (ORCID: https://orcid.org/0009-0000-2422-5026)
Institutions
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- Quantum Devices (United States) (US)
- Yukhnovskii Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine (UA)
- Institute of Semiconductors (CN)
- Beijing Academy of Quantum Information Sciences (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1021/acs.nanolett.4c03646
- Citations
- 6
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 2.03
Funders
- National Natural Science Foundation of China
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- National Key Research and Development Program of China