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The Triangular and Coulomb Bound Potential Quantum Dot Qubit

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Abstract

Under the condition of electron-LO-phonon strong coupling in a triangular and Coulomb bound potential quantum dot (QD) qubit, the eigenenergies and eigenfunctions of the ground-state and the first-excited state are obtained by using a variational method of the Pekar type. This system in QD may be employed as a quantum system-qubit and the numerical calculations are performed, meanwhile the relations of the period of oscillation on the electron-LO-phonon coupling strength, the Coulomb binding parameter, the polar angle and the confinement length are derived.

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Acknowledgements

This project was supported by the Research Science Project for the Colleges and Universities of Inner Mongolia Autonomous Region (No. NJzy11218), the Research Science Project for the Natural Science Foundation of Inner Mongolia (No. 2011MS0102), The National Natural Science Foundation of China (No. 11264001) and the Research Science Project for the Natural Science Foundation of Inner Mongolia (No. 2012MS0116).

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Authors and Affiliations

  1. Department of Physics and Electronic Information Engineering, Chifeng College, Chifeng, 024000, China

    Hong-juan Li & Ji-wen Yin

  2. College of Physics and Electronic Information, Inner Mongolia National University, Tongliao, 028043, China

    Jing-lin Xiao

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  1. Hong-juan Li
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  2. Ji-wen Yin
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Correspondence to Hong-juan Li.

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Li, Hj., Yin, Jw. & Xiao, Jl. The Triangular and Coulomb Bound Potential Quantum Dot Qubit. J Low Temp Phys 172, 266–273 (2013). https://doi.org/10.1007/s10909-013-0863-0

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