Bound magneto-polaron in triangular quantum dot qubit under an electric field

• Evolution of the quantum state of magnetopolaron using Pekar type variational method on the electric-LO-phonon strong coupling.
• Triangular quantum dot with Coulomb impurity.
• The Eigen energies and the Eigen functions of the ground state and the first excited state.
• The Shannon entropy, Transition frequency and the period of oscillation for different control parameter.

In this paper, we examine the time evolution of the quantum mechanical state of a magnetopolaron using the Pekar type variational method on the electric-LO-phonon strong coupling in a triangular quantum dot with Coulomb impurity. We obtain the Eigen energies and the Eigen functions of the ground state and the first excited state, respectively. This system in a quantum dot is treated as a two-level quantum system qubit and numerical calculations are done. The Shannon entropy and the expressions relating the period of oscillation and the electron-LO-phonon coupling strength, the Coulomb binding parameter and the polar angle are derived.