The influence of electric field on a parabolic quantum dot qubit |
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| Authors: | Yin Ji-Wen Xiao Jing-Lin Yu Yi-Fu Wang Zi-Wu |
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| Affiliation: | Department of Physic and Electronic Information Engineering, Chifeng College, Chifeng 024000, China; College of Physics and Electronic Information Inner Mongolia Normal University, Tongliao 028043, China |
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| Abstract: | ![]()
This paper calculates the time evolution of the quantum mechanicalstate of an electron by using variational method of Pekar type onthe condition of electric--LO-phonon strong coupling in a parabolicquantum dot. It obtains the eigenenergies of the ground state andthe first-excited state, the eigenfunctions of the ground state andthe first-excited state This system in a quantum dot may be employedas a two-level quantum system qubit. The superposition stateelectron density oscillates in the quantum dot with a period whenthe electron is in the superposition state of the ground and thefirst-excited state. It studies the influence of the electric fieldon the eigenenergies of the ground state, the first-excited stateand the period of oscillation at the different electron--LO-phononcoupling constant and the different confinement length. |
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| Keywords: | quantum dot quantuminformation qubit |
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