Properties of Unsymmetrical Parabolic Confinement Potential Quantum Dot Qubit |
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Authors: | CHEN Shi-Hua and XIAO Jing-Lin |
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Institution: | College of Sciences, Huzhou Vocational Technology College,
Huzhou 313000, China
;Department of Physics, Inner Mongolia University for Nationalities,
Tongliao 028043, China |
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Abstract: | On the condition of electric-LO phonon strong coupling in unsymmetrical
parabolic confinement potential quantum dot (QD),
we obtain the eigenenergies of the ground state
and the first-excited state, the eigenfunctions of the ground
state, and the first-excited state by using variational method of
Pekar type. This system in QD may be employed as a two-level
quantum system-qubit. When the electron is in the superposition
state of the ground state and the first-excited state, we obtain
the time evolution of the electron density. The relations both the
probability density of electron and the period of oscillation with
the electron-LO-phonon coupling strength, the confinement
strengths in the xy-plane and the z-direction are discussed. |
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Keywords: | quantum dot qubit binding energy |
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