Function in quantum field theory showing probability amplitudes of moving particles
This article is about time evolution in quantum field theory. For propagation of plants, see Plant propagation.
Quantum field theory
Feynman diagram
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In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given period of time, or to travel with a certain energy and momentum. In Feynman diagrams, which serve to calculate the rate of collisions in quantum field theory, virtual particles contribute their propagator to the rate of the scattering event described by the respective diagram. Propagators may also be viewed as the inverse of the wave operator appropriate to the particle, and are, therefore, often called (causal) Green's functions (called "causal" to distinguish it from the elliptic Laplacian Green's function).[1][2]
^The mathematics of PDEs and the wave equation, p 32., Michael P. Lamoureux, University of Calgary, Seismic Imaging Summer School, August 7–11, 2006, Calgary.
convolution of the initial wave function and the propagator. For a time-translationally invariant system, the propagator only depends on the time difference t −...
little. Non-electric propagators (mainly a seed tray and a clear plastic lid) are a lot cheaper to purchase than a heated propagator, but without the constant...
bosonic or fermionic propagator. A bosonic propagator is represented by a wavy line connecting two vertices (•~•). A fermionic propagator is represented by...
Eocarterus propagator is a species of ground beetle in the genus Eocarterus. "Eocarterus propagator (Reitter, 1901)". Catalogue of Life. Retrieved 2023-04-08...
Look up propagation in Wiktionary, the free dictionary. Propagation can refer to: Chain propagation in a chemical reaction mechanism Crack propagation...
A propagating rift is a seafloor feature associated with spreading centers at mid-ocean ridges and back-arc basins. They are more commonly observed on...
with the fermion propagator, the form of the photon propagator inspired by the free photon field will be compared to the photon propagator calculated up...
its Propagator R&D brewhouse in Venice, California. The first beer brewed at the Propagator was Generation 1, a West Coast-style IPA. The Propagator features...
A reactive center, also called a propagating center, in chemistry is a particular location, usually an atom, within a chemical compound that is the likely...
{\displaystyle (-M-)_{n}(polymer)+M(monomer)\rightarrow (-M-)_{n+1}} IUPAC Gold Book definition: chain-propagating reaction Chain reaction IUPAC Gold Book v t e...
Monocotyledons typically lack a vascular cambium, making them more challenging to propagate. Plant propagation is the process of plant reproduction of a species or...
q^{2}} -dependence of the propagator is determined by the four-momenta of the incoming and outgoing particles. The propagator typically has singularities...
In medicine, public health, and biology, transmission is the passing of a pathogen causing communicable disease from an infected host individual or group...
narrow-width limit of the Gaussian wave packet solution discussed is the free propagator kernel K. For other differential equations, this is usually called the...
theory, the Dirac propagator has a single pole as the theory describes only a single particle. However, calculating the propagator from the naive action...
ABC, MTV, VH1, Facebook, Yahoo!, and AOL. In 2018, IAC sold Electus to Propagate Content. Electus was founded by Ben Silverman, former co-chairman of NBC...
of propagators going toward the past, since the Schrödinger equation is time-reversible. The past propagator is the same as the future propagator except...
a desired variety onto a suitable rootstock. Perennial plants can be propagated either by sexual or vegetative means. Sexual reproduction begins when...
waves propagate. It is a form of transmission medium. The permittivity and permeability of the medium define how electromagnetic waves propagate in it...
uncertainties due to measurement limitations (e.g., instrument precision) which propagate due to the combination of variables in the function. The uncertainty u...
develops a mass gap on a lattice. The corresponding time-ordered value, the propagator, will have the property lim p → 0 Δ ( p ) = c o n s t a n t {\displaystyle...
infinitely small checkerboard squares the sum of all weighted paths yields a propagator that satisfies the one-dimensional Dirac equation. As a result, helicity...
angiosperms) disseminate their seeds. Edible fruits in particular have long propagated using the movements of humans and other animals in a symbiotic relationship...
The Society in Scotland for Propagating Christian Knowledge, or the SSPCK, was a group established in Scotland to ensure the better understanding of the...
commercial purposes, including botanical evaluation, apple cultivars are propagated by clonal grafting onto rootstocks. Apple trees grown without rootstocks...
as Japanese utsukushii (美しい, generally meaning "beautiful"), which was propagated by then-Prime Minister Shinzo Abe, pointing out that neither the etymology...