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CATEGORIES:Lecture/Presentation
DESCRIPTION:Presented by: Cliff Burgess\, Perimeter Institute and MacMaster
  University\n\nAbstract: We live at a time of contradictory messages about 
 how successfully we understand gravity. General Relativity seems to work ve
 ry well in the Earth’s immediate neighbourhood\, but arguments abound that 
 it needs modification at very small and/or very large distances. This talk 
 tries to put this discussion into the broader context of similar situations
  in other areas of physics\, and summarizes some of the lessons which our g
 ood understanding of gravity in the solar system has for proponents for its
  modification over very long and very short distances. The main message is 
 that effective theories (in the technical sense of effective) provide the n
 atural (and arguably only known) precise language for framing proposals. It
 s framework is also useful\, inasmuch as it makes some modifications seem m
 ore plausible than others\, though there are also some surprises. Amongst t
 he surprises is evidence that in some ways gravity behaves more like conden
 sed matter physics or optics than particle physics\, raising the possibilit
 y that tools from these areas may play a useful role in understanding puzzl
 es with cosmology and black holes.\n\nHost: Shanta DeAlwis\n\nCoffee\, tea\
 , and cookies will be available starting at 3:45 p.m.\, in DUAN G1B31.
DTEND:20190221T000000Z
DTSTAMP:20260419T110928Z
DTSTART:20190220T230000Z
GEO:40.007992;-105.267479
LOCATION:Duane Physics and Astrophysics\, G1B20
SEQUENCE:0
SUMMARY:Physics Colloquium\, "Effective Field Theories & Modifying Gravity:
  The View from Below"
UID:tag:localist.com\,2008:EventInstance_4232551
URL:https://calendar.colorado.edu/event/physics_colloquium_5345
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