Cosmic acceleration with cosmological soft phonons in a network of large structures

TL;DR

This paper proposes a novel cosmological model where collective motions of large structures create a scalar field that drives cosmic acceleration, mimicking dark energy effects similar to soft phonons in solid-state physics.

Contribution

It introduces a new framework linking large-scale structure interactions to cosmic acceleration through a mean-field scalar effect analogous to soft phonons.

Findings

Constraints on model parameters from supernova data

Evidence for time variation in the soft phonon equation of state

Model mimics phantom dark energy behavior

Abstract

The dark energy scalar field is here presented as a mean-field effect arising from the collective motion of interacting structures on an expanding lattice. This cosmological analogue to solid-state soft phonons in an unstable crystal network is shown to produce cosmic acceleration while mimicking phantom equation of state. From an analysis of the Hubble diagram of type Ia supernovae, we present constraints and discussion on the parameters of the cosmic Lagrange chain, as well as on time-variation of the soft phonon equation of state.