The Dimensional Regularization (DR) of Bollini and Giambiagi (BG) can not be defined for all Schwartz Tempered Distributions Explicitly Lorentz Invariant (STDELI) ${\cal S}^{'}_L$. In this paper we overcome such limitation and show that it can be generalized to all aforementioned STDELI and obtain a product in a ring with zero divisors. For this purpose, we resort to a formula obtained by Bollini and Rocca and demonstrate the existence of the convolution (in Minkowskian space) of such distributions. This is done by following a procedure similar to that used so as to define a general convolution between the Ultradistributions of J. Sebastiao e Silva (JSS), also known as Ultrahyperfunctions, obtained by Bollini et al.. Using the Inverse Fourier Transform we get the ring with zero divisors ${\cal S}^{'}_{LA}$, defined as ${\cal S}^{'}_{LA}={\cal F}^{-1}\{{\cal S}^{'}_L\}$, where ${\cal F}^{-1}$ denotes the Inverse Fourier Transform. In this manner we effect a dimensional regularization in momentum \color{red}space (the ring ${\cal S}^{'}_{L}$) via convolution, and a product of distributions in the corresponding configuration space (the ring ${\cal S}^{'}_{LA})$. This generalizes the results obtained by BG for Euclidean space We provide several examples of the application of our new results in Quantum Field Theory (QFT). In particular, the convolution of $n$ massless Feynman's propagators and the convolution of n massless Wheeler's propagators in Minkowskian space. The results obtained in this work have already allowed us to calculate the classical partition function of Newtonian gravity, for the first time ever, in the Gibbs' formulation and in the Tsallis' one. It is our hope that this convolution will allow one to quantize non-renormalizable Quantum Field Theories (QFT's
26 July 2018 in Physica A: Statistical Mechanics and its Applications
Verlinde conjectured that gravitation is an emergent entropic force. This surprising conjecture was proved in Plastino and Rocca (2018) within a purely classical context. Here, we appeal to a quantum environment to deal with the conjecture in the case of bosons and consider also the classical limit of quantum mechanics (QM).
This paper is an attempt to study the thermodynamics of the structure formation in the large scale universe in the non local gravity using Boltzmann statistics and the Tsallis statistics. The partition function is obtained in both the approaches and the corresponding thermodynamics properties are evaluated. The important thing about the paper is that we surprisingly get the divergence free integrals and thus stress upon the fact that the nonlocal gravity is the singularity free model of gravity.
18 April 2021 in General Relativity and Gravitation