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Some troubling things about our universe
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Universe or Multiverse? - Neutron Stars and Black Holes Lecture 14
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- 1 Time: AM
- 2 Neutron Stars and Black Holes Lecture - 14: Universe or Multiverse?!
- 3 Universe or Multiverse?!
- 4 What have we learn about our universe during last
- 5 Our Universe is expanding
- 6 The present expansion rate
- 7 Age of the Universe
- 8 The Universe is not only expanding,it is Accelerating!
- 9 Geometry of the universe is Euclidean
- 10 The geometry of the Universe
- 11 Critical density
- 12 The Energy-Density Budget of the Universe
- 13 The Present Revolution in Astronomy
- 14 A Singularity Theorem
- 15 Some troubling things about our universe
- 16 The "Horizon" problem
- 17 Isotropy of the Cosmic Microwave Background
- 18 At t~10-36 sec
- 19 At Planck time =10-43 sec, the size of the universe exceeded the causality scale by 10 power 28
- 20 The "Flatness" problem
- 21 How to fix the Horizon Problem
- 22 Why would the early universe expand exponentially?
- 23 Inflationary Universe
- 24 The "Heavy Nothing" or Vacuum Energy
- 25 Matter & Radiation exert positive pressure
- 26 Vacuum exerts negative pressure!
- 27 Exponential Expansion
- 28 An initial exponential expansion
- 29 Ingredient of Inflation
- 30 Unification of forces Cosmological Phase Transitions
- 31 Symmetry Breaking and Phase Transitions
- 32 Landau's theory of second order transition
- 33 First order Phase Transition
- 34 Supercooling and Superheating
- 35 Nucleation during transition
- 36 Cosmological Phase Transitions
- 37 Symmetry Breaking and Phase Transitions
- 38 Gauge Symmetry
- 39 Gauge Theories of elementary particles
- 40 Vacuum Driven Acceleration
- 41 Exponential Expansion
- 42 A curved surface expands by a factor of 3 in each panel.
- 43 But there are problems!
- 44 The initial hope was not to be!
- 45 'New' Inflation
- 46 Slow Roll Inflation
- 47 New Inflation - a summary
- 48 Inflation: underlying assumptions
- 49 Chaotic Inflation
- 50 Robertson-Walker Universe
- 51 The essence of Chaotic Inflation
- 52 Inflation is generic!
- 53 Eternal Inflation
- 54 Multiverses
- 55 Was there a beginning?
- 56 History in "Imaginary time"
- 57 Cycles of time
- 58 Wrap Up
