# Universe's Primordial Quantum Memories

## TL;DR

This paper argues that the Universe retained its primordial quantum memories from an early epoch, with de Sitter space's maximal memory capacity leading to a quantum break that could leave observable imprints, offering a new window into the Universe's origin.

## Contribution

It introduces a universal memory burden effect applicable to de Sitter space, linking quantum memory growth to the Universe's early inflationary phase and potential observable signatures.

## Key findings

- De Sitter space has maximal quantum memory capacity due to Gibbons-Hawking entropy.
- Memory burden grows over time, eventually causing de Sitter quantum break.
- Observable imprints of primordial memory patterns may exist if inflation ended near the quantum break-time.

## Abstract

We provide a very general argument showing that the Universe must have kept its quantum memories from an epoch much earlier than $60$ e-foldings before the end of inflation. The point is that a generic system of enhanced memory storage capacity exhibits a phenomenon of memory burden. Due to its universal nature this effect must be applicable to de Sitter since the latter has a maximal memory storage capacity thanks to its Gibbons-Hawking entropy. The primordial information pattern encoded in de Sitter memory initially costs very little energy. However, because of Gibbons-Hawking evaporation, the memory burden of the pattern grows in time and increasingly back reacts on the evaporation process. After a finite time the memory burden becomes unbearable and de Sitter quantum breaks. If inflation ended not long before its quantum break-time, the imprints of the primordial memory pattern can be observable. This provides a qualitatively new type of window in the Universe's beginning, a sort of cosmic quantum hair.