Light incoherence due to background space fluctuations

TL;DR

This paper explains why light coherence loss over cosmological distances is negligible, using an analogy with atomic collision-induced light fluctuations, and discusses implications for stellar interferometry.

Contribution

It introduces a novel analogy between atomic collision effects and space fluctuations to explain light coherence preservation over large distances.

Findings

Coherence loss due to space fluctuations is negligible for cosmological distances.

Atomic collision analogy helps understand light propagation in fluctuating backgrounds.

Implications for the feasibility of stellar interferometry over large scales.

Abstract

Working by analogy, we use the description of light fluctuations due to random collisions of the radiating atoms to figure out why the reduction of the coherence for light propagating a cosmological distance in the fluctuating background space is negligibly small to be observed by the stellar interferometry.