Big Bang, Blowup, and Modular Curves: Algebraic Geometry in Cosmology

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SUMMARY

The discussion centers on the paper "Big Bang, Blowup, and Modular Curves: Algebraic Geometry in Cosmology" by Yuri I. Manin and Matilde Marcolli, which introduces algebraic geometric models to describe cosmological phenomena such as the Big Bang and the Mixmaster Universe. The authors propose using the algebraic geometric blow-up of a point to create a boundary that includes the projective space of tangent directions and the light cone. They assert that time on this boundary undergoes a Wick rotation, transforming it into an imaginary dimension, and interpret Penrose's crossover concept as a natural boundary of Minkowski space at infinity. This framework provides a new perspective on the early universe's kinematics and the transition between aeons.

PREREQUISITES
  • Understanding of algebraic geometry concepts, particularly blow-up techniques.
  • Familiarity with cosmological models, specifically the Big Bang and Mixmaster Universe.
  • Knowledge of Wick rotation and its implications in theoretical physics.
  • Basic comprehension of Minkowski space and its boundaries in cosmology.
NEXT STEPS
  • Study algebraic geometric blow-up techniques in detail.
  • Research the Mixmaster Universe and its implications for cosmological models.
  • Explore Wick rotation and its applications in theoretical physics.
  • Investigate Penrose's ideas on aeons and their relevance to cosmological boundaries.
USEFUL FOR

Researchers in theoretical physics, mathematicians specializing in algebraic geometry, and cosmologists interested in the mathematical modeling of the universe's origins and structure.

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http://arxiv.org/abs/1402.2158

Big Bang, Blowup, and Modular Curves: Algebraic Geometry in Cosmology

Yuri I. Manin, Matilde Marcolli
(Submitted on 10 Feb 2014 (v1), last revised 9 Jul 2014 (this version, v3))
We introduce some algebraic geometric models in cosmology related to the "boundaries" of space-time: Big Bang, Mixmaster Universe, Penrose's crossovers between aeons. We suggest to model the kinematics of Big Bang using the algebraic geometric (or analytic) blow up of a point x. This creates a boundary which consists of the projective space of tangent directions to x and possibly of the light cone of x. We argue that time on the boundary undergoes the Wick rotation and becomes purely imaginary. The Mixmaster (Bianchi IX) model of the early history of the universe is neatly explained in this picture by postulating that the reverse Wick rotation follows a hyperbolic geodesic connecting imaginary time axis to the real one. Penrose's idea to see the Big Bang as a sign of crossover from "the end of previous aeon" of the expanding and cooling Universe to the "beginning of the next aeon" is interpreted as an identification of a natural boundary of Minkowski space at infinity with the Big Bang boundary.



They suggest a model of the kinematics of Big Bang using the algebraic geometric (or analytic) blow up of a some point creating a projective space boundary of light cone in which time on the boundary undergoes the Wick rotation and becomes purely imaginary by postulating that the reverse Wick rotation follows a hyperbolic geodesic connecting imaginary time axis to the real one.

Well. Math is fun i guess (Exclusive to mathematicians)..
 
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