The cosmological origin of time-asymmetry

Abstract

In this paper we address the problem of the arrow of time from a cosmological point of view, rejecting the traditional entropic approach that defines the future direction of time as the direction of the entropy increase: from our perspective, the arrow of time has a global origin and it is an intrinsic, geometrical feature of space-time. Time orientability and existence of a cosmic time are necessary conditions for defining an arrow of time, which is manifested globally as the time-asymmetry of the universe as a whole, and locally as a time-asymmetric energy flux. We also consider arrows of time of different origins (quantum, electromagnetic, thermodynamic, etc.) showing that they can be non-conventionally defined only if the geometrical arrow is previously defined.

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Cited by in corpus (7)

• The arrow of time: from universe time-asymmetry to local irreversible processes
• The direction of time: from the global arrow to the local arrow
• A global and non-entropic arrow of time: the double role of the energy-momentum tensor
• Foundations of quantum mechanics: decoherence and interpretation
• The role of symmetry in the interpretation of quantum mechanics
• Probing time orientability of spacetime
• Generalized Ideal Gas Equations for Structureful Universe