The strained state cosmology

TL;DR

The paper proposes a novel cosmological model where space-time behaves like an elastic material, explaining accelerated expansion and dark energy phenomena through strain fields, aligning with observations and offering an alternative to standard cosmology.

Contribution

It introduces the Strained State Cosmology, extending elastic deformation concepts to four dimensions, and demonstrates its consistency with cosmological data and phenomena.

Findings

Reproduces accelerated expansion via space-time strain fields.

Models dark energy as a property of the space-time strain.

Fits cosmological data with a single parameter, the bulk modulus.

Abstract

Starting from some relevant facts concerning the behaviour of the universe over large scale and time span, the analogy between the geometric approach of General Relativ- ity and the classical description of an elastic strained material continuum is discussed. Extending the elastic deformation approach to four dimensions it is shown that the accelerated expansion of the universe is recovered. The strain field of space-time repro- duces properties similar to the ones ascribed to the dark energy currently called in to explain the accelerated expansion. The strain field in the primordial universe behaves as radiation, but asymptotically it reproduces the cosmological constant. Subjecting the theory to a number of cosmological tests confirms the soundness of the approach and gives an optimal value for the one parameter of the model, i.e. the bulk modulus of the space-time continuum. Finally various aspects of the Strained State Cosmology (SSC) are discussed and contrasted with some non-linear massive gravity theories. The possible role of structure topological defects is also mentioned. The conclusion is that SSC is at least as good as the LCDM standard cosmology, giving a more intuitive interpretation of the physical nature of the phenomena.