Quantum field theory on noncommutative spaces

RJ Szabo - Physics Reports, 2003 - Elsevier
A pedagogical and self-contained introduction to noncommutative quantum field theory is
presented, with emphasis on those properties that are intimately tied to string theory and …

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A

S Vagnozzi, R Roy, YD Tsai, L Visinelli… - … and Quantum Gravity, 2023 - iopscience.iop.org
Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

Symmetry, gravity and noncommutativity

RJ Szabo - Classical and Quantum Gravity, 2006 - iopscience.iop.org
We review some aspects of the implementation of spacetime symmetries in noncommutative
field theories, emphasizing their origin in string theory and how they may be used to …

Moyal planes are spectral triples

V Gayral, JM Gracia-Bondia, B Iochum… - … in mathematical physics, 2004 - Springer
Axioms for nonunital spectral triples, extending those introduced in the unital case by
Connes, are proposed. As a guide, and for the sake of their importance in noncommutative …

Emergent gravity from noncommutative gauge theory

H Steinacker - Journal of High Energy Physics, 2007 - iopscience.iop.org
We show that the matrix-model action for noncommutative U (n) gauge theory actually
describes SU (n) gauge theory coupled to gravity. This is elaborated in the 4-dimensional …

Infinitely many star products to play with

JM Gracia-Bondia, F Lizzi, G Marmo… - Journal of High Energy …, 2002 - iopscience.iop.org
While there has been growing interest for noncommutative spaces in recent times, most
examples have been based on the simplest noncommutative algebra:[xi, xj]= iθ ij. Here we …

Quantized gauge theory on the fuzzy sphere as random matrix model

H Steinacker - Nuclear Physics B, 2004 - Elsevier
U (n) Yang–Mills theory on the fuzzy sphere S2N is quantized using random matrix methods.
The gauge theory is formulated as a matrix model for a single Hermitian matrix subject to a …

Exact solution of quantum field theory on noncommutative phase spaces

E Langmann, RJ Szabo… - Journal of High Energy …, 2004 - iopscience.iop.org
We present the exact solution of a scalar field theory defined with noncommuting position
and momentum variables. The model describes charged particles in a uniform magnetic …

Emergent gravity from noncommutative space–time

HS Yang - International Journal of Modern Physics A, 2009 - World Scientific
We showed before that self-dual electromagnetism in noncommutative (NC) space–time is
equivalent to self-dual Einstein gravity. This result implies a striking picture about gravity …

Symplectic groupoids and Poisson electrodynamics

VG Kupriyanov, AA Sharapov, RJ Szabo - Journal of High Energy Physics, 2024 - Springer
A bstract We develop a geometric approach to Poisson electrodynamics, that is, the semi-
classical limit of noncommutative U (1) gauge theory. Our framework is based on an …