| Role of Interactions in Electronic Structure of a Two-Electron Quantum Dot Molecule |
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| 作者姓名： | 董庆瑞 徐应强 张石勇 牛智川 |
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| 作者单位： | StateKeyLaboratoryforSuperlatticesandMicrostructures,InstituteofSemiconductors,ChineseAcademyofSciences,POBox912,Beijing100083 |
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| 摘 要： | We have studied a two-electron quantum dot molecule in a magnetic field. The electron interaction is treated accurately by the direct diagonalization of the Hamiltonian matrix. We calculate two lowest energy levels of the two-electron quantum dot molecule in a magnetic field. Our results show that the electron interactions are significant, as they can change the total spin of the two-electron ground state of the system by adjusting the magnetic field between S = 0 and S = 1. The energy difference AE between the lowest S = 0 and S = 1 states is shown as a function of the axial magnetic field. We found that the energy difference between the lowest S = 0 and S = 1 states in the strong-B S = 0 state varies linearly. Our results provide a possible realization for a qubit to be fabricated by current growth techniques.
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| 关 键 词： | 半导体 量子点 原子电子 半导体 |
Role of Interactions in Electronic Structure of a Two-Electron Quantum Dot Molecule |
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| DONG Qing-Rui,XU Ying-Qiang,ZHANG Shi-Yong,NIU Zhi-Chuan.Role of Interactions in Electronic Structure of a Two-Electron Quantum Dot Molecule[J].Chinese Physics Letters,2004,21(12):2496-2499. |
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| Authors: | DONG Qing-Rui XU Ying-Qiang ZHANG Shi-Yong NIU Zhi-Chuan |
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| Affiliation: | State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083 |
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| Abstract: | |
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| Keywords: | 71 10 -w 73 21 -b |
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