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  • 12 - The Seeds of Cosmic Structure, the Black Hole Information Puzzle, and the Entropic Arrow of Time

  • from Part IV - The Whole Universe
  • Edited by Cristian López, Université de Lausanne, Switzerland, Olimpia Lombardi, Universidad de Buenos Aires, Argentina
  • Book:
    The Arrow of Time
    Published online:
    28 October 2025
    Print publication:
    30 October 2025, pp 250-266

  • Summary

    The conceptual problems of quantum theory make a particularly strong appearance in contexts such as black hole physics, or the physics of the very early universe, where the theory must be used with nothing that could be reasonably given the “role of observer” or a “measuring device.” As such, those situations offer a rather fertile ground, where proposals for dealing with those problems could produce results that actually differ substantially from the ones obtained within the “standard type” of studies, where those questions are essentially ignored. We will explore the ways in which one of the proposals to address the so-called measurement problem affects various specific issues that arise within the above-mentioned fields. We will see that in our specific approach to the subject several well-known and concrete problems seem to simply disappear, and in particular, that it could offer a novel and unexpected account for the nature of the entropic arrow of time in cosmology.