Time variation of the fine structure constant in decrumpling or TVSD model

TL;DR

This paper investigates how the fine structure constant varies over time within a universe model where spatial dimensions change, using observational data to estimate current variations of these dimensions.

Contribution

It introduces a model with time-variable spatial dimensions and derives the present variation of the fine structure constant based on observational bounds.

Findings

Estimated current variation of spatial dimensions.

Constraints on the time variation of the fine structure constant.

Implications for models with dynamic spatial dimensions.

Abstract

Within the framework of a model universe with time variable space dimension (TVSD), known as decrumpling or TVSD model, we study the time variation of the fine structure constant. Using observational bounds on the present time variation of the fine structure constant, we are able to obtain the present time variation of spatial dimensions.