On the time arrows, and randomness in cosmological signals

Abstract

Arrows of time - thermodynamical, cosmological, electromagnetic, quantum mechanical, psychological - are basic properties of Nature. For a quantum system-bath closed system the de-correlated initial conditions and no-memory (Markovian) dynamics are outlined as necessary conditions for the appearance of the thermodynamical arrow. The emergence of the arrow for the system evolving according to non-unitary dynamics due to the presence of the bath, then, is a result of limited observability, and we conjecture the arrow in the observable Universe as determined by the dark sector acting as a bath. The voids in the large scale matter distribution induce hyperbolicity of the null geodesics, with possible observational consequences.

Eur.Phys.J. (to appear), 7 pages, 4 figs; talk at Time Machine Factory conf. (Turin, 2012)

References in corpus (5)

• Kolmogorov cosmic microwave background sky
• Kolmogorov stochasticity parameter measuring the randomness in Cosmic Microwave Background
• Flat Universe with Hyperbolic Voids
• On the origin of the Cold Spot
• Degree of randomness: numerical experiments for astrophysical signals

Cited by in corpus (1)

• Reparametrization Invariance and Some of the Key Properties of Physical Systems