Influence of Magnetic Field and LO Phonon Effect on Properties of Magnetopolarons and Qubit in Quantum Disks
International Journal of Theoretical Physics, ISSN: 1572-9575, Vol: 54, Issue: 9, Page: 3268-3277
2015
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Article Description
Influence of external magnetic field, longitudinal-optical (LO) phonon effect and thickness of quantum disks (QDs) on the properties of electron-LO phonon strong-coupling magnetopolarons and the qubit is studied by using Lee -Low-Pines-Huybrechts variational method. The expressions for the mean number of phonons of magnetopolarons N̄$\bar {N}$, electron-LO phonon interaction energy Ee−ph, energies of the ground and first-excited states E0 and E1, oscillation period T0 of qubits and probability distribution ρ of electrons are derived. Results of numerical calculations show that the mean number of phonons of the ground state of magnetopolarons is larger than that of the first-excited state, the mean number of phonons of magnetopolarons N̄$\bar {N}$ increases with increasing the cyclotron frequency ωc, confinement strength ω0 and coupling strength α, but decreases and oscillates with increasing the thickness of QDs L; Ee−ph is always negative, ∣Ee-ph∣ of the ground state is larger than that of the first-excited state, and ∣Ee-ph∣ increases with increasing ωc, ω0 and α but decreases with increasing L; E0 and E1 increase with increasing ωc, ω0 and α, but decrease with increasing L; T0 increases with increasing ω0 and L, but decreases with increasing α; ρ decreases and oscillates with increasing L, and decreases with increasing ω0; the variations of T0 and ρ with ωc and L are influenced by ω0 and α significantly.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84939272164&origin=inward; http://dx.doi.org/10.1007/s10773-015-2565-7; http://link.springer.com/10.1007/s10773-015-2565-7; http://link.springer.com/content/pdf/10.1007/s10773-015-2565-7; http://link.springer.com/content/pdf/10.1007/s10773-015-2565-7.pdf; http://link.springer.com/article/10.1007/s10773-015-2565-7/fulltext.html; https://dx.doi.org/10.1007/s10773-015-2565-7; https://link.springer.com/article/10.1007/s10773-015-2565-7
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