Quantum field theory

Topic in quantum field theory

mathematical transformation in physics that moves the times of events through a common interval

In theoretical physics, path-ordering is the procedure (or a meta-operator \mathcal P) that orders a product of operators according to the value of a chosen parameter:

A scalar field having types of self interactions

integral of a functional over a space of curves

field theory of a point particle confined to move on a fixed manifold

situation quantum field theories with massless particles, in which Feynman integrals diverge due to low-energy (long-distance) contributions, requiring a cutoff representing detector threshold

QED of lagrangian scalar field in 4D

supersymmetric generalization of Coleman–Mandula theorem: the only possible (super-)symmetries of a nontrivial 4d Lorentzian QFT are (super-)Poincaré symmetry and internal symmetries

in physics, an estimate of the self-energy of a many-body system

type of Feynman diagram

Yang–Mills coupled to a Higgs field

constraints on possible particle properties

In quantum mechanics, superselection extends the concept of selection rules.

dual to the Dirac spinor

maximum or minimum value for physics concepts

type of mass in quantum field theory

physical field theory with no forces/interactions

theory

classification of irreducible representations of the Poincaré group

particular perturbative analysis of quantum field theories

quantum electrodynamics in 1+1 dimensions

quantum theory in 1+1 dimensions

mixed state describing a system in thermal equilibrium

technique for evaluating loop integrals which arise from Feynman diagrams

energy difference between ground state and lightest excited state(s)

situation in which a Feynman integral diverges due to high-energy (short-distance) contributions, requiring regularization/renormalization or some ultraviolet completion

term in theoretical physics