These lectures are divided into two parts. In Part 1 I discuss bound state topics at the level of a basic course in field theory: The derivation of the Schr\"odinger and Dirac equations from the QED Lagrangian, by summing Feynman diagrams and in a Hamiltonian framework. Less well known topics include the equal-time wave function of Positronium in motion and the properties of the Dirac wave function for a linear potential. The presentation emphasizes physical aspects and provides the framework for Part 2, which discusses the derivation of relativistic bound states at Born level in QED and QCD. A central aspect is the maintenance of Poincar\'e invariance. The transformation of the wave function under boosts is studied in detail in D=1+1 dimensions, and its generalization to D=3+1 is indicated. Solving Gauss' law for A^0 with a non-vanishing boundary condition leads to a linear potential for QCD mesons, and an analogous confining potential for baryons.
Bound states -- from QED to QCD
These lectures are divided into two parts. In Part 1 I discuss bound state topics at the level of a basic course in field theory: The derivation of the Schr\"odinger and Dirac equations from the QED Lagrangian, by summing Feynman diagrams and in a Hamiltonian framework. Less well known topics include the equal-time wave function of Positronium in motion and the properties of the Dirac wave function for a linear potential. The presentation emphasizes physical aspects and provides the framework for Part 2, which discusses the derivation of relativistic bound states at Born level in QED and QCD. A central aspect is the maintenance of Poincar\'e invariance. The transformation of the wave function under boosts is studied in detail in D=1+1 dimensions, and its generalization to D=3+1 is indicated. Solving Gauss' law for A^0 with a non-vanishing boundary condition leads to a linear potential for QCD mesons, and an analogous confining potential for baryons.
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О психическом здоровье в физике Солнца
Вот какие, оказывается, бывают статьи под рубрикой Space Physics! Специально для уважаемой
maksina, если она еще читает ЖЖ :)) Raising… -
Гиперболические неподвижные точки
Раз: 20230729_164218_обр.jpg © qedqed.iMGSRC.RU и два: 20230729_164745_обр.jpg © qedqed.iMGSRC.RU
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Их нравы, или Любой каприз за ваши деньги!
Прислали статью на рецензию, сижу читаю. "Вигнеровский кристалл" - незнакомый термин, вбиваю в гугл. По мере впечатывания появляется подсказка:…
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