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0521U100922,
Доктор фізико-математичних наук
13-04-2021
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Nonlinear effects in quantum electrodynamics processes in a strong pulsed laser field
Lebed Oleksandr Anatoliyovych, к.ф.-м.н.
popup.head Lebed Oleksandr Anatoliyovych
popup.advisor Lebed Oleksandr Anatoliyovych
popup.opponent Gusynin Valery Pavlovych
popup.opponent Skalozub Volodymyr Vasylyovych
popup.opponent Merenkov Mykola Petrovych
Дисертаційна робота присвячена теоретичному дослідженню фізичних процесів в імпульсному лазерному полі методами квантової електродинаміки. Вивчаються кінематичні особливості процесів розсіювання електрона на ядрі, електрона на електроні, гальмівного випромінювання електрона та народження електрон-позитронної пари фотоном на ядрі в присутності зовнішнього імпульсного поля однієї та двох лазерних хвиль. Розвинуто теорію цих процесів, отримано явні вирази для амплітуд переходу та диференціальних перерізів, досліджено енергетичні та кутові розподіли частинок в кінцевому стані та проведено порівняльний аналіз для моделей монохроматичної та імпульсної лазерної хвилі. Проведено системний аналіз фізичних процесів в імпульсному полі за резонансних умов, у випадку двох хвиль при кореляції випромінювання та поглинання фотонів лазерного поля, при розсіюванні швидких частинок на малі кути за малих переданих імпульсів, у випадку коли енергія поля, що поглинається чи випромінюється частинкою, одного порядку за величиною з початковою кінетичною енергією частинок. Розвинуто методику усунення нефізичної резонансної розбіжності амплітуди та перерізу процесів в полі імпульсного лазера. Показано, що за особливих кінематичних умов нелінійні ефекти можуть приводити до суттєвого зростання перерізів процесів квантової електродинаміки в зовнішньому лазерному полі.
2021-04-23
2021-04-23
Updated: 2025-12-08
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