One more observational consequence of many-worlds quantum theory

TL;DR

This paper argues that the total number of human observations, as a quantum variable, influences the predicted lifetime of the universe, aligning it with string theory predictions and supporting the many-worlds interpretation of quantum mechanics.

Contribution

It introduces the idea that the number of coarse-grained histories is a quantum variable affecting universe lifetime predictions, providing observational support for many-worlds quantum theory.

Findings

The universe's lifetime can be comparable to string theory predictions when considering quantum variables.

The total number of observations is a quantum variable influencing cosmological predictions.

In phantom energy scenarios, the universe's maximum lifetime closely matches the fundamental time scale.

Abstract

Using new cosmological doomsday argument Page predicts that the maximal lifetime of de Sitter universe should be $t_{max}=10^{60}$ yr which is way too small in comparison with strings predictions ($t_f>$googleplex). However, since this prediction is dependant on the total number of human observations, we show that Page arguments results instead in astounding conclusion that this number is the quantum variable and is therefore much greater then Page's estimation. Identifying it with the number of coarse-grained histories in de Sitter universe we get the lifetime of the universe comparable with strings predictions. Moreover, it seems that this result can be considered as another one of the observational evidences of validity of the many-worlds quantum theory. Finally, we show that for the universe filled with phantom energy $t_{max}\sim t_f$ up to very high precision.