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Add to Calendar 10/13/2018 10:15 am 10/13/2018 America/Chicago Inflation and the Hot Big Bang: The Quantum Origin of Structure in the Universe DESCRIPTION:

The cosmological standard model has been overwhelmingly successful at describing our observed universe.  In this model, an accelerating, spatially flat universe underwent a hot, dense, early phase of expansion.  That hot Big-Bang produced light elements such as hydrogen and helium via nucleosynthesis and generated the relic cosmic microwave background (CMB) radiation. However, this theory has a problem: the CMB we observe is uniform to 0.01% across the sky, despite apparently being composed of roughly 40,000 causally disconnected patches.  Within the cosmological standard model, this measurement is inconsistent with cause-and-effect!  In this talk, I will describe how an earlier epoch of accelerated expansion called “inflation” solves this horizon problem, while giving rise to quantum mechanical fluctuations that seed the structures observed in our Universe today.

Inflation and the Hot Big Bang

\n\nSPEAKER:

Professor Peter Adshead, Department of Physics, University of Illinois

141 Loomis Laboratory

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Inflation and the Hot Big Bang: The Quantum Origin of Structure in the Universe

Speaker Professor Peter Adshead, Department of Physics, University of Illinois
Date: 10/13/2018
Time: 10:15 a.m.
Location:

141 Loomis Laboratory

Sponsor:

Department of Physics

Event Type: Lecture
 

The cosmological standard model has been overwhelmingly successful at describing our observed universe.  In this model, an accelerating, spatially flat universe underwent a hot, dense, early phase of expansion.  That hot Big-Bang produced light elements such as hydrogen and helium via nucleosynthesis and generated the relic cosmic microwave background (CMB) radiation. However, this theory has a problem: the CMB we observe is uniform to 0.01% across the sky, despite apparently being composed of roughly 40,000 causally disconnected patches.  Within the cosmological standard model, this measurement is inconsistent with cause-and-effect!  In this talk, I will describe how an earlier epoch of accelerated expansion called “inflation” solves this horizon problem, while giving rise to quantum mechanical fluctuations that seed the structures observed in our Universe today.

Inflation and the Hot Big Bang

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