Vacuums and strings


Why it is meaningful to speak about strings in cosmology


Credit: the TNG-project, The video can be shared as long as it is for non-commercial purposes. Comments: The interstellar magnetic field strength: blue/purple shows regions of low magnetic energy arranged along filaments of the cosmic web, while orange and white show regions with significant magnetic energy inside halos and galaxies. Time evolution of the inside of a 10Mpc (comoving) region within TNG100-1 from the start of the simulation to z=0. (01:45);

My document: Isbn 019 9 chapter1 (505.03 Ko) 


Astronomical measurements try to determinate the nature and the curvature of our observable universe. As a matter of evidence, empty volumes are quite more frequent than non-empty ones. This is true at any scale: either inside atoms or for galaxies.

This fact may induce the unconventional hypothesis that particles are just the foam of energetical fluctuations occurring in the empty regions of the universe. With different words, they are a little bit like the tops of icebergs. But a better description is perhaps to imagine the particles as the result of some change in the usual state of what we generically label as the “vacuum” (a little bit like the water can be either solid, liquid or a gas). This thesis defends the idea that these empty regions behave like a perfect fluid in a quasi-stable equilibrium accepting small deformations.

With that approximative and provisory hypothesis, I suppose that the expansion is equivalent to a force acting on any small and tubular piece of that electromagnetic fluid for which Maxwell’s laws for electromagnetism hold true. The basic ideas concerning the cross products within the theory of the (E) question are then enough to easily recover the equation of state for a perfect fluid. The generalization of these ideas (i.e.: the deformations of the cross products) are also enough to envisage a whole set of equations of the state centered on the one of a perfect fluid.

This lucky coincidence and its generalizations will certainly be hardly criticized by the scientific communities because the hypothesis allowing to reach these results is indirectly saying that the empty regions can be identified with a kind of ether; namely: that perfect electromagnetic fluid. And this name may be interpreted as another name for Maxwell’s luminiferous aether. Because of that, it may be in a frontal conflict with the actual paradigm.

© Thierry PERIAT

Nevertheless, you may also enjoy the visit of the following extern pages and understand why strings have been the inspiration for my theoretical work, a long time ago, long before we had computers to do the N-body simulations:


Back to the head of this chapter.

event Date de dernière mise à jour : 15/09/2020