Influence of Coulomb Potential on the Properties of a Polaron in a Quantum Dot

  • Department of Physics and Electronic Informational Engineering,Inner Mongolia Chifeng College,Chifeng 024000,China
  • Department of Physics and Electronic Information,Inner Mongolia University for Nationalities,Tongliao 028043,China

Key words: squeezed-statequantum dotpolaron

Abstract: The ground-state energy and the average number of virtual phonons around the electron of a hydrogenic impurity confined in a parabolic quantum dot are calculated using the squeezed-state variational approach,which is based on two successive canonical transformations and uses a displaced-oscillator type unitary transformation to deal with the bilinear terms,which are usually neglected.Numerical calculations are carried out in order to study the relation between the ground-state energy and the average number of virtual phonons around the electron of a bound polaron in a parabolic quantum dot with the Coulomb binding parameter.The electron-phonon coupling constant and the confinement length are derived.

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