Causal perturbation theory is a mathematically rigorous approach to renormalization theory, which makes it possible to put the theoretical setup of perturbative...

approach to quantum physics Causal perturbation theory, a mathematically rigorous approach to renormalization theory Causal theories, a phenomenon in social...

provides access to field configurations that are not accessible to perturbation theory, such as solitons. Similarly, non-trivial vacuum states can be identified...

a theory which avoids differential field equations. Infrared divergence Cutoff (physics) Renormalization group UV fixed point Causal perturbation theory...

model-driven approach for causal discovery using Algorithmic Information Theory and perturbation analysis. It solves inverse causal problems by studying dynamical...

is unfalsifiable pseudoscience. The theory has found practical application in the development of the Perturbational Complexity Index (PCI), an empirical...

rigorous mathematical approach to renormalization theory is the so-called causal perturbation theory, where ultraviolet divergences are avoided from the...

physics, but was hindered by the extensive use of perturbation theory, which prevented the theory from succeeding in strongly correlated systems. Conformal...

Dirac's theory was hugely successful in explaining both the emission and absorption of radiation by atoms; by applying second-order perturbation theory, it...

extremely technical) causal perturbation theory. This does not solve the problem in other situations. Many other interesting theories are non-linear, like...

non-perturbative function or process is one that cannot be described by perturbation theory. An example is the function f ( x ) = e − 1 / x 2 , {\displaystyle...

Causality (physics) Causal sets Causal dynamical triangulation Causal filter Causal perturbation theory Causal system Causality loop Causal structure Causality...

inflationary potentials, as long as the theory can be studied through perturbation theory. Linde proposed a theory known as chaotic inflation in which he...

regularization Lattice regularization Zeta function regularization Causal perturbation theory Hadamard regularization Point-splitting regularization v t e...

In physics, especially quantum field theory, regularization is a method of modifying observables which have singularities in order to make them finite...

some successes when d is taken to approach another integer value where the theory appears to be strongly coupled as in the case of the Wilson–Fisher fixed...

arbitrarily small perturbations of the metric. A spacetime is stably causal if it cannot be made to contain closed causal curves by any perturbation smaller than...

naked singularities. Approximate solutions may also be found by perturbation theories such as linearized gravity and its generalization, the post-Newtonian...

Causal analysis is the field of experimental design and statistics pertaining to establishing cause and effect. Typically it involves establishing four...

{\displaystyle \eta _{\mu \nu }={\text{diag}}(1,-1,-1,-1)} . Causal perturbation theory explains how sources weakly act. For a weak source emitting spin-0...

In quantum field theory, and especially in quantum electrodynamics, the interacting theory leads to infinite quantities that have to be absorbed in a...

terms from finite parts in loop calculations in field theory in order to renormalize the theory. Wolfgang Pauli and Felix Villars published the method...

Retrieved 13 February 2023. Bertschinger, Edmund (2000). "Cosmological Perturbation Theory and Structure Formation". arXiv:astro-ph/0101009. Bertschinger, Edmund...

proposed a generally covariant field theory that did not require recourse to renormalization or perturbation theory. In 1965, Tonnelat published a book...

often be linearized by approximating them by a linear system using perturbation theory, and linear techniques can be used. Mathematical techniques for analyzing...

attempts to give precise meanings to ill-conditioned sums appearing in number theory. There are several different summation methods called zeta function regularization...

electron-hole pairs) and the Sternheimer equation (density-functional perturbation theory). Hohenberg, P.; Kohn, W. (1964). "Inhomogeneous Electron Gas". Physical...

lesser-known but no less important theories include causal dynamical triangulation, noncommutative geometry, and twistor theory. One of the difficulties of formulating...

coupling to matter fields of quantum field theory, fate of the renormalization of the graviton in perturbation theory that lead to ultraviolet divergence beyond...

The theory of causal fermion systems is an approach to describe fundamental physics. It provides a unification of the weak, the strong and the electromagnetic...