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Inflation by Robert Nemiroff Michigan Technological University.

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Presentation on theme: "Inflation by Robert Nemiroff Michigan Technological University."— Presentation transcript:

1 Inflation by Robert Nemiroff Michigan Technological University

2 Physics X: About This Course Officially "Extraordinary Concepts in Physics" Being taught for credit at Michigan Tech o Light on math, heavy on concepts o Anyone anywhere is welcome No textbook required o Wikipedia, web links, and lectures only o Find all the lectures with Google at: "Starship Asterisk" then "Physics X" o

3 Problems with Original Big Bang Horizon problem o Why is the universe so uniform? o How does the left part of the universe know to have the same temperature as the right part? Flatness problem o Why is the geometry of the universe so close to flat? Magnetic monopole problem

4 Forces in the Universe Gravity Electromagnetism Strong Nuclear Force Weak Nuclear Force Electroweak force Grand unified theories Superstring theories

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6 InflationInflation to the Rescue Universe suddenly begins to expand exponentially Caused by phase transition as strong nuclear force freezes out A repulsive cosmological constant temporarily dominates the energy density of the universe As inflation ends, matter and radiation are again created o Why inflation ends is related to the driving field, but is really unknown.

7 Timeline for the Early Universe t=10-43 sec, T=1033 K o Planck scale: theory of everything t=10-37 sec, T=1029 K o Grand unified theory phase transition o Strong nuclear force freezes out o Inflation T=10-35 sec, T=1028 K o Inflation ends o Particles created

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9 Inflating the Universe Credit: WMAP Science Team, NASA APOD: 2006 March 23

10 A Force from Empty Space: The Casimir Effect Credit & Copyright: Umar Mohideen (U. California at Riverside) APOD: 2002 September 17


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