PHYS 190 Lecture Notes - Lecture 27: Observable Universe
30 Apr 2018
School
Department
Course
Professor
For$a$short$time$after$creation,$expansion$proceeds$"normally"
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But$deep$inside$small$patches,$thers$been$enough$time$for$temperatures$to$
"Equilibrate"
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Distant$points$are$at$very different$temps
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As$temperatures$dropped,$universe$got$"stuck"$in$the$"wrong"$(metastable)$
state
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Then$a$bubble$of$"right"$phase$formed$spontaneously$and$grew$exponentially$
fast
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INFLATION
Very$fast$expansion
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2$problems:$horizon$and$flatness
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WHY$WAS$INFLATION$PROPOSE?$WHAT$ARE$THE$2$PROBLMES?
In$fact,$bubble$universes$may$be$"inflating"$all$the$time,$somewhere$/$when$in'a'
multiverse
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ETERNAL'INFLATION
And$our$bubble$may$contain$an$almost$uncountable$number$of$patches,$far$
beyond$our$observable$universe$(ex.$Path)
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Laws$of$physics$likely$very$different$in$other$bubbles/patches
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MANY$OTHER$BUBBLES$MAY$LIE$FAR$BEYOND$OURS
Multiverse
○
Very$lively
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Quantum$flucuations
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LAST%LECTURE
Tuesday,$ April$10,$2018
2:31$PM
