Pre-bangian origin of our entropy and time arrow
G. Veneziano

TL;DR
This paper proposes that classical and quantum effects in string cosmology naturally produce the observed entropy and time arrow, aligning with holographic bounds and suggesting a critical transition in the early universe.
Contribution
It introduces a mechanism where entropy and the arrow of time emerge from string cosmology effects, linking holographic bounds to a crucial branch change and phase transition.
Findings
Entropy saturates holographic bounds at radiation exit
A critical branch change triggers the end of the string phase
Effective Planck mass reaches a critical value during transition
Abstract
I argue that, in the chaotic version of string cosmology proposed recently, classical and quantum effects generate, at the time of exit to radiation, the correct amount of entropy to saturate a Hubble (or holography) entropy bound (HEB) and to identify, within our own Universe, the arrow of time. Demanding that the HEB be fulfilled at all times forces a crucial "branch change" to occur, and the so-called string phase to end at a critical value of the effective Planck mass, in agreement with previous conjectures.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
