Надкритична нестабiльнiсть дiракiвських електронiв у полi двох протилежно заряджених ядер

• Дата: 2019
• Автор: Sobol, O. O.
• Формат: Стаття
• Мова: English; Ukrainian
• Опубліковано: Publishing house "Academperiodika" 2019
• Теми: надкритична нестабiльнiсть; змiна локалiзацiї хвильової функцiї; критичний дипольний момент; метод ЛКАО; supercritical instability; wave-function localization change; critical dipole moment; LCAO method; -
• Онлайн доступ: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019032
• Назва журналу: Ukrainian Journal of Physics

The Dirac equation for an electron in a finite dipole potential has been studied within the method of linear combination of atomic orbitals (LCAO). The Coulomb potential of the nuclei that compose a dipole is regularized, by considering the finite nuclear size. It is shown that if the dipole momentum reaches a certain critical value, the novel type of supercriticality occurs; namely, the wave function of the highest occupied electron bound state changes its localization from the negatively charged nucleus to the positively charged one. This phenomenon can be interpreted as a spontaneous creation of an electron-positron pair in vacuum, with each of the created particles being in the bound state with the corresponding nucleus and partially screening it.