NATS 1740 Lecture Notes - Lecture 22: Stephen Hawking, Spacetime, Neil Turok

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

Document Summary

The history of our universe in modern cosmology. Name one finding of the superstrings cosmology. Describe the picture of our universe in the m theory based cosmology. Linde"s chaotic inflationary theory is also called the inflation model. It solves the homogeneity problem: according to wmap after 1 second the universe was a few light-years across. Linde"s model achieves that by doubling the size of the. It also solves the inhomogeneity problem: wmap shows variations in density which lead to galaxies. Linde"s model explains these variations by the decay of the inflationary energy into radiation with various rates in various places. In addition the inflation model contains the dark energy mechanism to explain the current accelerated expansion of the universe. It is a top-down model, which means that the properties of our universe are related to contributions of probabilities from other parallel universes. Big bang is created from the interaction between two parallel universes when they contain only dark energy.