Zobrazeno 1 - 10
of 178
pro vyhledávání: '"S. Mignemi"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-7 (2024)
Abstract The Yang algebra was proposed a long time ago as a generalization of the Snyder algebra to the case of curved background spacetime. It includes as subalgebras both the Snyder and the de Sitter algebras and can therefore be viewed as a model
Externí odkaz:
https://doaj.org/article/104d77d642ea470bac39262194f9bdae
Autor:
S. Meljanac, S. Mignemi
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137289- (2022)
We consider generalizations of the Snyder algebra to a curved spacetime background with de Sitter symmetry. As special cases, we obtain the algebras of the Yang model and of triply special relativity. We discuss the realizations of these algebras in
Externí odkaz:
https://doaj.org/article/57a1da5773ef452797c2f096862dde10
Autor:
S.A. Franchino-Viñas, S. Mignemi
Publikováno v:
Nuclear Physics B, Vol 981, Iss , Pp 115871- (2022)
We study the two-dimensional version of a quartic self-interacting quantum scalar field on a curved and noncommutative space (Snyder-de Sitter). We show that the model is renormalizable at the one-loop level and compute the beta functions of the rela
Externí odkaz:
https://doaj.org/article/e5daabd6764b483c828c1c98c3b11980
Autor:
S. A. Franchino-Viñas, S. Mignemi
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-9 (2020)
Abstract We analyze the model of a self-interacting $$\phi ^4_{\star }$$ ϕ⋆4 scalar field theory in Snyder–de Sitter space. After analytically computing the one-loop beta functions in the small noncommutativity and curvature limit, we solve nume
Externí odkaz:
https://doaj.org/article/98629947b4ba48c2b123bccb981a2b19
Autor:
S. Meljanac, S. Mignemi
Publikováno v:
Physics Letters B, Vol 814, Iss , Pp 136117- (2021)
In a recent paper, we have studied associative realizations of the noncommutative extended Snyder model, obtained by including the Lorentz generators (tensorial coordinates) and their conjugated momenta. In this paper, we extend this result to also i
Externí odkaz:
https://doaj.org/article/cde1bc13f32649e1a4c4adda1f3c56a1
Autor:
S.A. Franchino-Viñas, S. Mignemi
Publikováno v:
Nuclear Physics B, Vol 959, Iss , Pp 115152- (2020)
We show that two indistinguishable aspects of the divergences occurring in the Casimir effect, namely the divergence of the energy of the higher modes and the non-compactness of the momentum space, get disentangled in a given noncommutative setup. To
Externí odkaz:
https://doaj.org/article/f28c9ba096d24fe385a3fec28db3e162
Autor:
S. Mignemi, A. Samsarov
Publikováno v:
Physics Letters B, Vol 779, Iss , Pp 244-248 (2018)
The vacuum energy is computed for a scalar field in a noncommutative background in several models of noncommutative geometry. One may expect that the noncommutativity introduces a natural cutoff on the ultraviolet divergences of field theory. Our cal
Externí odkaz:
https://doaj.org/article/bd14861abc9a48f18df7b3bd3b0eaf2b
Publikováno v:
Physics Letters B, Vol 768, Iss C, Pp 321-325 (2017)
We discuss the generalisation of the Snyder model that includes all possible deformations of the Heisenberg algebra compatible with Lorentz invariance and investigate its properties. We calculate perturbatively the law of addition of momenta and the
Externí odkaz:
https://doaj.org/article/70d8b38225284a67bd13e45b8d36f195
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