Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Antonio D. Pereira"'
Publikováno v:
Physics Letters B, Vol 838, Iss , Pp 137666- (2023)
Wetterich's equation provides a powerful tool for investigating the existence and universal properties of renormalization group fixed points exhibiting quantum scale invariance. Motivated by recent works on asymptotically safe scalar-tensor theories,
Externí odkaz:
https://doaj.org/article/e4a9dc8b128144d1803de000d65b74fa
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-50 (2021)
Abstract Asymptotic Safety provides an elegant mechanism for obtaining a consistent high-energy completion of gravity and gravity-matter systems. Following the initial idea by Steven Weinberg, the construction builds on an interacting fixed point of
Externí odkaz:
https://doaj.org/article/7477704f037b4d46b180df29df28334c
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-21 (2021)
Abstract We formally prove the existence of a quantization procedure that makes the path integral of a general diffeomorphism-invariant theory of gravity, with fixed total spacetime volume, equivalent to that of its unimodular version. This is achiev
Externí odkaz:
https://doaj.org/article/d2078d72a9214de88b9313e6ce9e3250
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 12, Pp 1-33 (2020)
Abstract At criticality, discrete quantum-gravity models are expected to give rise to continuum spacetime. Recent progress has established the functional renormalization group method in the context of such models as a practical tool to study their cr
Externí odkaz:
https://doaj.org/article/dcfbb830f7d34e6086de9623c8bdd920
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-34 (2020)
Abstract The renormalization group flow of unimodular quantum gravity is computed by taking into account the graviton and Faddeev-Popov ghosts anomalous dimensions. In this setting, a ultraviolet attractive fixed point is found. Symmetry-breaking ter
Externí odkaz:
https://doaj.org/article/43b157ea31dd4c83b186a9c9aa263e82
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 2, Pp 1-20 (2020)
Abstract Four-dimensional random geometries can be generated by statistical models with rank-4 tensors as random variables. These are dual to discrete building blocks of random geometries. We discover a potential candidate for a continuum limit in su
Externí odkaz:
https://doaj.org/article/d93c5477a11649e88edae57f5347e94e
Publikováno v:
Frontiers in Physics, Vol 9 (2021)
Externí odkaz:
https://doaj.org/article/449d3bf61f9c47058b00f9719bca75f1
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 9, Pp 1-53 (2019)
Abstract Constraining quantum gravity from observations is a challenge. We expand on the idea that the interplay of quantum gravity with matter could be key to meeting this challenge. Thus, we set out to confront different potential candidates for qu
Externí odkaz:
https://doaj.org/article/15544439daf5491ca7886041ba6163ab
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 8, Pp 1-43 (2019)
Abstract We investigate the Higgs-Yukawa system with Majorana masses of a fermion within asymptotically safe quantum gravity. Using the functional renormalization group method we derive the beta functions of the Majorana masses and the Yukawa couplin
Externí odkaz:
https://doaj.org/article/a08edd7ae7dd427bbee7254252d1ff30
Autor:
Antonio D. Pereira
Publikováno v:
Universe, Vol 8, Iss 4, p 198 (2022)
Asymptotically safe quantum gravity (ASQG) attempts to provide a standard quantum-field theoretic description of quantum spacetime across arbitrarily small length scales [...]
Externí odkaz:
https://doaj.org/article/c90fdc1ae50145898302c5fbaf86650c