Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.
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Quantum Field Theory (QFT) is the theoretical framework describing the quantisation of classical fields which allows a Lorentz-invariant formulation of quantum mechanics. QFT is used both in high energy physics as well as condensed matter physics and closely related to statistical field theory. Use this tag for many-body quantum-mechanical problems and the theory of [tag:particle-physics]. Don’t combine with [tag:quantum-mechanics].

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You have hit on the exact superficiality that drives people into supersymmetry theories. There is nothing fundamentally absolute about a 2-ODE governing the dynamical evolution of a ``particle''. Squa …
answered May 13 '14 by 299792458
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(This is a largely a response prompted by your comment.) You can get the answer by just remembering the commutation/anti-commutation properties of the $\gamma$ matrices, and the fact that ${\bar \ps …
answered Nov 2 '14 by 299792458
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Below that regime, we have the strongly coupled regime where perturbative approaches fail, due to the large value of coupling constant $\alpha_S$. The same is related to the QCD $\beta$ function via t …
answered Jul 23 '14 by 299792458
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The general recipe for such a construction was created by Sidney Coleman and his collaborators way back in 1969, in two epoch making Physical Review papers. (PROLA says the official citation count of …
answered May 28 '14 by 299792458
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"Derivation" of Baryon Number Conservation - Consider the QCD Lagrangian (density) $$\mathcal{L} = \bar{\psi}(i\gamma^\mu D_\mu - m)\psi - \frac{1}{4}G^a_{\mu\nu}G_a^{\mu\nu}$$ where the symbols h …
answered Sep 25 '14 by 299792458
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A pretty exhaustive summary in the context of Standard Model already exists in the following source: ''Dynamics of the Standard Model'' - Donoghue, Golowich, Holstein, Chapter 3 - Symmetries and An …
answered Jul 24 '14 by 299792458