Constraining quantum fluctuations of spacetime foam from BBN

Abstract

A possibility to describe quantum gravitational fluctuations of the spacetime background is provided by virtual $D$-branes. These effects may induce a tiny violation of the Lorentz invariance (as well as a possible violation of the equivalence principle). In this framework, we study the formation of light elements in the early Universe (Big Bang Nucleosynthesis). By using the Big Bang Nucleosynthesis observations, We infer an upper bound on the topological fluctuations in the spacetime foam vacuum ${\sigma }^2$, given by ${\sigma }^2\lesssim 10^{-22}$.

5 pages, 1 figure, to appear in EPJ Plus

References in corpus (8)

• Primordial Nucleosynthesis in the Precision Cosmology Era
• The Primordial Lithium Problem
• Big Bang Nucleosynthesis constraints on Barrow entropy
• Constraining The Early-Universe Baryon Density And Expansion Rate
• Decoherence induced CPT violation and entangled neutral mesons
• Big Bang Nucleosynthesis constraints on higher-order modified gravities
• Big Bang Nucleosynthesis and Entropy Evolution in $f(R,T)$ Gravity
• Stringy Space-Time Foam and High-Energy Cosmic Photons