Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Rachwał, Lesław"'
Publikováno v:
Eur. Phys. J. C 84, 961 (2024)
We study how the number of degrees of freedom in Weyl conformal gravity runs with the energy scale from the UV fixed point. To this end we employ two approaches. First, we utilize the Fradkin--Tseytlin prescription for the number of degrees of freedo
Externí odkaz:
http://arxiv.org/abs/2406.18096
The six-derivative conformal scalar operator was originally found by Hamada in its critical dimension of spacetime, $d=6$. We generalize this construction to arbitrary dimensions $d$ by adding new terms cubic in gravitational curvatures and by changi
Externí odkaz:
http://arxiv.org/abs/2312.17725
Autor:
Calcagni, Gianluca, Giacchini, Breno L., Modesto, Leonardo, Netto, Tibério de Paula, Rachwał, Lesław
We extensively study the ultraviolet quantum properties of a nonlocal action for gravity nonminimally coupled to matter. The theory unifies matter and gravity in an action principle such that all the classical solutions of Einstein's theory coupled t
Externí odkaz:
http://arxiv.org/abs/2306.09416
This chapter of the Handbook of Quantum Gravity aims to illustrate how nonlocality can be implemented in field theories, as well as the manner it solves fundamental difficulties of gravitational theories. We review Stelle's quadratic gravity, which a
Externí odkaz:
http://arxiv.org/abs/2211.05606
Autor:
Calcagni, Gianluca, Rachwał, Lesław
Publikováno v:
JCAP09(2023)003
We explore quantum field theories with fractional d'Alembertian $\Box^\gamma$. Both a scalar field theory with a derivative-dependent potential and gauge theory are super-renormalizable for a fractional power $1<\gamma\leq 2$, one-loop super-renormal
Externí odkaz:
http://arxiv.org/abs/2210.04914
Autor:
Rachwał, Lesław
Publikováno v:
Acta Polytech. 62 1, 118-156, 2022
We extensively motivate the studies of higher-derivative gravities, and in particular we emphasize which new quantum features theories with six derivatives in their definitions possess. Next, we discuss the mathematical structure of the exact on the
Externí odkaz:
http://arxiv.org/abs/2205.09893
Autor:
Rachwał, Lesław
Publikováno v:
Universe 2022, 8(4), 225
A method for consistent quantization of conformal gravity treating conformal symmetry in a very controllable way is presented. First, we discuss local conformal symmetry in the framework of gravitational interactions, where we view it as an example o
Externí odkaz:
http://arxiv.org/abs/2204.13856
Autor:
Rachwal, Leslaw
Publikováno v:
Universe 8 , no. 4, 229 (2022)
We present and discuss well known conditions for ultraviolet finiteness and asymptotic safety. The requirements for complete absence of ultraviolet divergences in quantum field theories and existence of a non-trivial fixed point for renormalization g
Externí odkaz:
http://arxiv.org/abs/2204.09858
Publikováno v:
Eur. Phys. J. Plus 136 (2021) 1043
The conventional model of the gauge vector field is invariant under the local conformal symmetry only in the four-dimensional space ($4d$). Conformal generalization to an arbitrary dimension $d$ is impossible even for the free theory, differently fro
Externí odkaz:
http://arxiv.org/abs/2107.13125
Autor:
Rachwał, Lesław, Giaccari, Stefano
Publikováno v:
Journal of Physics: Conference Series 1956 (2021) 012012
In this paper, we introduce and motivate the studies of Quantum Weyl Gravity (also known as Conformal Gravity). We discuss some appealing features of this theory both on classical and quantum level. The construction of the quantum theory is described
Externí odkaz:
http://arxiv.org/abs/2107.07033