Results 111 to 120 of about 11,408,683 (276)
Holomorphic field theories and higher algebra
Bulletin of the London Mathematical Society, Volume 57, Issue 10, Page 2903-2974, October 2025.Abstract Aimed at complex geometers and representation theorists, this survey explores higher dimensional analogs of the rich interplay between Riemann surfaces, Virasoro and Kac‐Moody Lie algebras, and conformal blocks. We introduce a panoply of examples from physics — field theories that are holomorphic in nature, such as holomorphic Chern‐Simons ...
Owen Gwilliam, Brian R. Williams
wiley +1 more source
Effective gravitational couplings of Kaluza-Klein gauge theories
Journal of High Energy Physics, 2023 We study the effective gravitational couplings of four-dimensional gauge theories with eight supercharges. The class of theories we analyse are arrived at via Kaluza-Klein compactification of five-dimensional gauge theories.
Sujay K. Ashok +4 more
doaj +1 more source
Nonperturbative effects of vacuum energy on the recent expansion of the universe [PDF]
, 1999 We show that the vacuum energy of a free quantized field of very low mass can significantly alter the recent expansion of the universe. The effective action of the theory is obtained from a non-perturbative sum of scalar curvature terms in the propagator.
L. Parker, A. Raval
semanticscholar +1 more source
Cosmological constant and Euclidean space from nonperturbative quantum torsion
, 2014 Heisenberg's nonperturbative quantization technique is applied to the nonpertrubative quantization of gravity. An infinite set of equations for all Green's functions is obtained. An approximation is considered where: (a) the metric remains as a classical
Heisenberg W. +3 more
core +1 more source
DVCS via color dipoles: Nonperturbative effects
, 2008 We study the DVCS amplitude within the color dipole approach. The light-cone wave function of a real photon is evaluated in the instanton vacuum model. Our parameter free calculations are able to describe H1 data, both the absolute values and the $t$-dependences, at medium-high values of $Q^{2}$.
Kopeliovich, B. Z. +2 more
openaire +2 more sources
Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect
Advanced Physics Research, Volume 4, Issue 7, July 2025.This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò +4 more
wiley +1 more source
Non-perturbative effects in μ → eγ
Journal of High Energy Physics, 2019 We compute the non-perturbative contribution of semileptonic tensor operators q ¯ σ μ ν q ℓ ¯ σ μ ν ℓ $$ \left(\overline{q}{\sigma}^{\mu \nu }q\right)\left(\overline{\ell}{\sigma}_{\mu \nu}\ell \right) $$ to the purely leptonic process μ → eγ and to the ...
Wouter Dekens +3 more
doaj +1 more source
physica status solidi (b), Volume 262, Issue 7, July 2025.It is demonstrated that the relaxation time approximation (RTA) for the quantum kinetic equation, a simple method for describing nonequilibrium steady states, has a critical flaw in the longitudinal nonlinear DC conductivity of insulators under weak electric fields.
Ibuki Terada +3 more
wiley +1 more source
Structure of hyperbolic polynomial automorphisms of C2${\mathbb {C}^2}$ with disconnected Julia sets
Proceedings of the London Mathematical Society, Volume 130, Issue 6, June 2025.Abstract For a hyperbolic polynomial automorphism of C2$\mathbb {C}^2$ with a disconnected Julia set, and under a mild dissipativity condition, we give a topological description of the components of the Julia set. Namely, there are finitely many “quasi‐solenoids” that govern the asymptotic behavior of the orbits of all nontrivial components.
Romain Dujardin, Mikhail Lyubich
wiley +1 more source
Nonperturbative Effects on the String World Sheet (Ii)
Nuclear Physics B, 1987 We show that the space-time superpotential, which is known to receive no string theoretic corrections in finite orders in α′, is modified by world-sheet instantons. This has a number of interesting consequences for the physics of compactification schemes which lead to low-energy supersymmetry.
M. Dine +3 more
openaire +1 more source