Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Moschella, Ugo"'
Autor:
Moschella, Ugo
We review the role of the spectral condition as a characteristic feature unifying Minkowski, de Sitter and anti de Sitter Quantum Field Theory. In this context, we highlight the role of an important class of plane waves which are either de Sitter or
Externí odkaz:
http://arxiv.org/abs/2403.15893
We discuss general one and two-loops banana diagrams with arbitrary masses on the de Sitter spacetime by using direct methods of dS quantum field theory in the dimensional regularization approach. In the one-loop case we also compute the effective po
Externí odkaz:
http://arxiv.org/abs/2403.13145
We discuss general one and two-loop banana diagrams and one-loop diagrams with external lines with arbitrary masses on the anti de Sitter spacetime by using methods of AdS quantum field theory in the dimensional regularization approach. The banana di
Externí odkaz:
http://arxiv.org/abs/2403.13142
We reconsider the computation of banana integrals at different loops, by working in the configuration space, in any dimension. We show how the 2-loop banana integral can be computed directly from the configuration space representation, without the ne
Externí odkaz:
http://arxiv.org/abs/2304.00624
We come back to the issue of bosonization of fermions in two spacetime dimension and give a new costruction in the steady state case where left and right moving particles can coexist at two different temperatures. A crucial role in our construction i
Externí odkaz:
http://arxiv.org/abs/2203.02747
Autor:
Moschella, Ugo, Novello, Mario
We come back on the dynamical properties of k-essential cosmological models and show how the interesting phenomenological features of those models are related to the existence of boundaries in the phase surface. We focus our attention to the branchin
Externí odkaz:
http://arxiv.org/abs/2103.10473
Autor:
Moschella, Ugo1,2,3 (AUTHOR) ugo.moschella@uninsubria.it
Publikováno v:
Universe (2218-1997). May2024, Vol. 10 Issue 5, p199. 21p.
Autor:
Epstein, Henri, Moschella, Ugo
We study bosonic Quantum Field Theory on the double covering $\widetilde{dS}_{2}$ of the 2-dimensional de Sitter universe, identified to a coset space of the group $SL(2,{\Bbb R})$. The latter acts effectively on $\widetilde{dS}_{2}$ and can be inter
Externí odkaz:
http://arxiv.org/abs/2002.12084
Publikováno v:
In Nuclear Physics, Section B October 2023 995
Autor:
Epstein, Henri, Moschella, Ugo
Publikováno v:
Int.J.Mod.Phys. A33 (2018) no.34, 1845009
Motivated by the study of soluble models of quantum field theory, we illustrate a new type of topological effect by comparing the constructions of canonical Klein-Gordon quantum fields on the two-dimensional de Sitter spacetime as opposed to its doub
Externí odkaz:
http://arxiv.org/abs/1901.10874