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Temperature, impurity and electromagnetic field effects on the transition of a two-level system in a triangular potential

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Abstract.

Using the Pekar variational method, the effects of the temperature, impurity and electromagnetic fields on the transition are investigated through the eigenenergies of the ground and first-excited states of the polaron in a triangular potential quantum dot. Those parameters are essential for the transition of the polaron from the ground state to the first-excited state. This quantum system in nanostructure can be employed as a two-level quantum qubit. The numerical result shows the weak evolution of the probability density with the electron-phonon coupling constant, the cyclotron frequency and the Coulombic potential. It is also noted that this probability increased with the confinement length and electric-field strength. The tunneling of temperature leads to the amplification of the probability density.

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Authors and Affiliations

  1. Mesoscopic and Multilayers Structures Laboratory, Department of Physics, Faculty of Science, University of Dschang, P.O. Box 479, Dschang, Cameroon

    A. J. Fotue, S. C. Kenfack, M. Tiotsop, N. Issofa, M. P. Tabue Djemmo, A. V. Wirngo & L. C. Fai

  2. Laboratory of Electronics and Signal Processing, Department of Physics, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon

    H. Fotsin

  3. Laboratory of Mechanics and Modeling of Physical Systems, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon

    M. P. Tabue Djemmo

Authors
  1. A. J. Fotue
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  2. S. C. Kenfack
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  3. M. Tiotsop
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  4. N. Issofa
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  5. M. P. Tabue Djemmo
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  6. A. V. Wirngo
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  7. H. Fotsin
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  8. L. C. Fai
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Correspondence to A. J. Fotue.

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Fotue, A.J., Kenfack, S.C., Tiotsop, M. et al. Temperature, impurity and electromagnetic field effects on the transition of a two-level system in a triangular potential. Eur. Phys. J. Plus 131, 75 (2016). https://doi.org/10.1140/epjp/i2016-16075-9

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  • DOI: https://doi.org/10.1140/epjp/i2016-16075-9

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