The arrow of time: from universe time-asymmetry to local irreversible processes

TL;DR

This paper proposes a global, non-entropic framework linking the universe's geometric time-asymmetry to local irreversible processes, offering a new perspective on the physical origin of the arrow of time.

Contribution

It demonstrates that the universe's geometric time-asymmetry can explain local irreversible phenomena without relying on entropy-based explanations.

Findings

Global time-asymmetry transfers to local energy flows.

The approach accounts for irreversible phenomena traditionally linked to the arrow of time.

Supports a non-entropic, geometrical understanding of temporal directionality.

Abstract

In several previous papers we have argued for a global and non-entropic approach to the problem of the arrow of time, according to which the ''arrow'' is only a metaphorical way of expressing the geometrical time-asymmetry of the universe. We have also shown that, under definite conditions, this global time-asymmetry can be transferred to local contexts as an energy flow that points to the same temporal direction all over the spacetime. The aim of this paper is to complete the global and non-entropic program by showing that our approach is able to account for irreversible local phenomena, which have been traditionally considered as the physical origin of the arrow of time.