Detailed Analysis of the Probability of a Sharp Increase in the Universe's Expansion Rate Due to the Spread of Life in the Universe in the Context of the Acta Universi Hypothesis
DMITRIY YASHCHENKO
Abstract
The hypothesis of Acta Universi (AU-field), proposed in 2025, reinterprets dark energy as a universal archive of events, where entropy S_Θ, generated by life processes, directly influences the cosmological constant Λ_eff and the expansion rate H(t). This article analyzes the probability of a sharp increase in the universe's expansion rate—potentially leading to a phantom energy regime (w < -1) and a Big Rip scenario—as a consequence of the cosmic spread of life through panspermia or technological colonization. In standard cosmology, this probability is low (~1–5%), as life's entropy production is negligible on cosmic scales. In Acta Universi, it is high (50–90%), as life's exponential spread boosts S_total, altering ρ_DE and w(t). Calculations show that if life colonizes 10^9 planets, δw ≈ -10^{-5}, with sharp acceleration if S_total grows exponentially. The analysis draws on 2025 DESI results hinting at evolving dark energy and panspermia models. Philosophical implications include life as a "cosmic accelerator."