Coulomb bound potential quantum rod qubit |
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Authors: | Wei Xiao Jing-Lin Xiao |
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Affiliation: | 1. Department of Basic, University of Informational Science and Technology of Beijing, Beijing 100101, China;2. College of Physics and Electronic Information, Inner Mongolia National University, Tongliao 028043, China |
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Abstract: | We study the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to LO-phonon in a quantum rod with a hydrogen-like impurity at the center by using the variational method of Pekar type. This quantum rod system may be used as a two-level quantum qubit. When the electron is in the superposition state of the ground and the first-excited states, the probability density of the electron oscillates in the quantum rod. It is found that the probability density and the oscillation period are individually increased and decreased due to the presence of the Coulomb interaction between the electron and the hydrogen-like impurity. The oscillation period is an increasing function of the ellipsoid aspect ratio and the effective confinement lengths of the quantum rod, whereas it is a decreasing one of the electron–phonon coupling strength. |
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Keywords: | Quantum rods Qubit Coulomb bound potential |
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