arXiv subjects

Julien Queva

Publications and source records attributed to Julien Queva.

3 recordsLinked to original sources

arXiv2016

Stueckelberg massive electromagnetism in de Sitter and anti-de Sitter spacetimes: Two-point functions and renormalized stress-energy tensors

By considering Hadamard vacuum states, we first construct the two-point functions associated with Stueckelberg massive electromagnetism in de Sitter and anti-de Sitter spacetimes. Then, from the general formalism developed in [A. Belokogne and A. Folacci, Phys. Rev. D \textbf{93}, 044063 (2016)], we obtain an exact analytical expression for the vacuum expectation value of the renormalized stress-energy tensor of the massive vector field propagating in these maximally symmetric spacetimes.

gr-qc↗

arXiv2015

The conformally invariant symmetric traceless field: a conformal field strength and a conformally invariant gauge fixing equation over (A)dS$_4$

The conformally invariant symmetric traceless field $A$ is considered. In four dimensions it possesses a scalar gauge invariance to which we provide a conformally invariant gauge fixing equation. A field strength $F$ is built upon $A$, its properties are worked out, giving rise to a set of conformally invariant equations exhibiting an electromagnetic duality.

gr-qc↗

arXiv2006

Fuzzy de Sitter space-times via coherent states quantization

A construction of the 2d and 4d fuzzy de Sitter hyperboloids is carried out by using a (vector) coherent state quantization. We get a natural discretization of the dS "time" axis based on the spectrum of Casimir operators of the respective maximal compact subgroups SO(2) and SO(4) of the de Sitter groups SO\_0(1,2) and SO\_0(1,4). The continuous limit at infinite spins is examined.

quant-ph↗