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searching for Correlation function (quantum field theory) 30 found (117 total)

alternate case: correlation function (quantum field theory)

Vertex function (492 words) [view diff] no match in snippet view article find links to article

perturbation theory. In particular, it is the one particle irreducible correlation function involving the fermion ψ {\displaystyle \psi } , the antifermion ψ

Mermin–Wagner theorem (4,374 words) [view diff] no match in snippet view article find links to article

In quantum field theory and statistical mechanics, the Hohenberg–Mermin–Wagner theorem or Mermin–Wagner theorem (also known as Mermin–Wagner–Berezinskii

Thirring model (766 words) [view diff] no match in snippet view article find links to article

The Thirring model is an exactly solvable quantum field theory which describes the self-interactions of a Dirac field in (1+1) dimensions. The Thirring

Chern–Simons theory (3,591 words) [view diff] no match in snippet view article find links to article

The Chern–Simons theory is a 3-dimensional topological quantum field theory of Schwarz type. It was discovered first by mathematical physicist Albert Schwarz

Partition function (mathematics) (3,384 words) [view diff] no match in snippet view article

Fubini–Study metric, the theory of quantum mechanics and more generally quantum field theory results. In these theories, the partition function is heavily exploited

Gerhart Lüders (454 words) [view diff] no match in snippet view article find links to article

January 1995) was a German theoretical physicist who worked mainly in quantum field theory and was well known for the discovery and a general proof of the CPT

Non-linear sigma model (1,287 words) [view diff] no match in snippet view article find links to article

In quantum field theory, a nonlinear σ model describes a field Σ that takes on values in a nonlinear manifold called the target manifold T. The non-linear

Scaling dimension (959 words) [view diff] no match in snippet view article find links to article

scaling dimension, or simply dimension, of a local operator in a quantum field theory characterizes the rescaling properties of the operator under spacetime

Initial and final state radiation (657 words) [view diff] no match in snippet view article find links to article

amplitude or correlation function of a quantum mechanical or statistical field theory. Within the canonical formulation of quantum field theory, a Feynman

1/N expansion (758 words) [view diff] no match in snippet view article find links to article

In quantum field theory and statistical mechanics, the 1/N expansion (also known as the "large N" expansion) is a particular perturbative analysis of quantum

QCD sum rules (397 words) [view diff] no match in snippet view article find links to article

of these currents. Quantum chromodynamics Lattice QCD Sum rules (Quantum Field Theory) Sum rule in quantum mechanics SVZ sum rules at Scholarpedia Shifman

Two-dimensional conformal field theory (5,674 words) [view diff] no match in snippet view article find links to article

A two-dimensional conformal field theory is a quantum field theory on a Euclidean two-dimensional space, that is invariant under local conformal transformations

João Penedones (487 words) [view diff] no match in snippet view article find links to article

Portugal) is a Portuguese theoretical physicist active in the area of quantum field theory. He is currently an associate professor at the École Polytechnique

Goldstone boson (3,733 words) [view diff] no match in snippet view article find links to article

Jeffrey Goldstone, and systematically generalized in the context of quantum field theory. In condensed matter physics such bosons are quasiparticles and are

Scale invariance (4,486 words) [view diff] no match in snippet view article find links to article

classical physical processes with no characteristic length scale. In quantum field theory, scale invariance has an interpretation in terms of particle physics

Conformal field theory (7,037 words) [view diff] no match in snippet view article find links to article

A conformal field theory (CFT) is a quantum field theory that is invariant under conformal transformations. In two dimensions, there is an infinite-dimensional

Hamiltonian truncation (3,716 words) [view diff] no match in snippet view article find links to article

=E_{\alpha }(\Lambda )|\psi _{\alpha }\rangle } . In a UV-finite quantum field theory, the resulting energies E α ( Λ ) {\displaystyle E_{\alpha }(\Lambda

Universality class (2,194 words) [view diff] no match in snippet view article find links to article

critical opalescence of liquid near its critical point. From the quantum field theory point of view, the critical exponents can be expressed in terms of

Fluctuation–dissipation theorem (4,520 words) [view diff] no match in snippet view article find links to article

proof can be found by means of the LSZ reduction, an identity from quantum field theory.[citation needed] The fluctuation–dissipation theorem can be generalized

Bose–Einstein correlations (2,135 words) [view diff] no match in snippet view article find links to article

reprinted in Ref.2, p. 326. Razumov, Leonid V.; Weiner, R.M. (1995). "Quantum field theory of Bose-Einstein correlations". Physics Letters B. 348 (1–2). Elsevier

W-algebra (5,488 words) [view diff] no match in snippet view article find links to article

(1985). "Infinite extra symmetries in two-dimensional conformal quantum field theory". Akademiya Nauk SSSR. Teoreticheskaya I Matematicheskaya Fizika

Langevin equation (5,214 words) [view diff] no match in snippet view article find links to article

} The path integral formulation allows for the use of tools from quantum field theory, such as perturbation and renormalization group methods. This formulation

Quantum dot single-photon source (3,232 words) [view diff] no match in snippet view article find links to article

single photons can be proven by measuring the second order intensity correlation function. The spontaneous emission rate of the emitted photons can be enhanced

Black hole information paradox (8,936 words) [view diff] no match in snippet view article find links to article

the 1970s, Stephen Hawking applied the semiclassical approach of quantum field theory in curved spacetime to such systems and found that an isolated black

Information field theory (6,022 words) [view diff] no match in snippet view article find links to article

Bayesian probabilities. It uses computational techniques developed for quantum field theory and statistical field theory to handle the infinite number of degrees

Critical exponent (2,211 words) [view diff] no match in snippet view article find links to article

1971 Universality classes from Sklogwiki Zinn-Justin, Jean (2002). Quantum field theory and critical phenomena, Oxford, Clarendon Press (2002), ISBN 0-19-850923-5

Berezinskii–Kosterlitz–Thouless transition (2,225 words) [view diff] no match in snippet view article find links to article

book}}: ISBN / Date incompatibility (help) Functional Integrals in Quantum Field Theory and Statistical Physics. Prokof'Ev, Nikolay; Ruebenacker, Oliver;

High-dimensional Ising model (6,317 words) [view diff] no match in snippet view article find links to article

field H. It is similar to the Lagrangian in of a scalar field in quantum field theory, the difference being that all the derivative terms enter with a

Phonon (6,999 words) [view diff] no match in snippet view article find links to article

function, but if it is interpreted as an operator, then it describes a quantum field theory of non-interacting bosons. The second quantization technique, similar

Classical XY model (4,861 words) [view diff] no match in snippet view article find links to article

simulations, and can also be computed by theoretical methods of quantum field theory, such as the renormalization group and the conformal bootstrap. Renormalization