NATS 1740 Lecture Notes - Lecture 19: M-Theory, Cosmological Constant, Pair Production

• School: York University
• Department: Natural Science
• Course: NATS 1740
• Professor: Radu Campeanu

Document Summary

Describe a few important moments during the big bang (superstrings, antiparticles, guth inflation, relation to standard model, protons fusion, radiation separation) Later moments: the formation of atoms, stars, galaxies. The traditional answers: god created it (plato) or it always existed (aristotle) are not acceptable for scientists. Not because scientists are not religious but because scientists want a more complete answer. An acceptable scientific answer: although the universe is not eternal it has neither a beginning nor an end. (hawking and the superstrings theory) Another correct scientific answer is: the universe started as a microscopic quantum fluctuation , possibly in a previously existing universe. The possibility that the universe eternally re-creates itself does not necessarily resolve the problem of creation, but pushes it back to indefinite past. Andrei linde introduced the self-reproducing universes in his chaotic inflationary theory. His quantum fields-based theory introduced waves of quantum fluctuations which are stretched by an inflation process.