Information carrying capacity of a cosmological constant

TL;DR

This paper demonstrates that a cosmological constant enhances and preserves the amount of information that can be exchanged via massless fields between timelike separated parties, unlike in matter-dominated universes.

Contribution

It reveals that a cosmological constant makes information transfer via massless fields highly resilient and increases with cosmic expansion, contrasting previous findings in matter-dominated cosmologies.

Findings

Information does not decay over time or distance in a universe with a cosmological constant.

The amount of recoverable information increases with the universe's expansion rate.

Contrasts with traditional light-signal communication and previous matter-dominated cosmology results.

Abstract

We analyze the exchange of information in different cosmological backgrounds when sender and receiver are timelike separated and communicate through massless fields (without the exchange of light-signals). Remarkably, we show that the dominance of a cosmological constant makes the amount of recoverable information imprinted in the field by the sender extremely resilient: it does not decay in time or with the spatial separation of sender and receiver, and it actually increases with the rate of expansion of the Universe. This is in stark contrast with the information carried by conventional light-signals and with previous results on timelike communication through massless fields in matter dominated cosmologies.