The Triangular and Coulomb Bound Potential Quantum Dot Qubit

Under the condition of electron-LO-phonon strong coupling in a triangular and Coulomb bound potential quantum dot (QD) qubit, the eigenenergies and eigenfunctions of the ground-state and the first-excited state are obtained by using a variational method of the Pekar type. This system in QD may be employed as a quantum system-qubit and the numerical calculations are performed, meanwhile the relations of the period of oscillation on the electron-LO-phonon coupling strength, the Coulomb binding parameter, the polar angle and the confinement length are derived.