BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3115
DTSTART:20131029T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T025343Z
LAST-MODIFIED:20131001T180338Z
LOCATION:Chamberlin 5280
SUMMARY:A second look at the string theory landscape \, Theory Seminar
  (High Energy/Cosmology)\, Thomas Van Riet\, University of Leuven
DESCRIPTION:I will review in a pedagogical manner the vanilla models (
 KKLT) that have lead to the conjecture of a string theory &amp\;quot\;
 landscape&amp\;quot\; of meta-stable de Sitter vacua. A central role i
 s played by the so called uplifting anti-branes that break the supersy
 mmetry of the AdS vacua and lift the cosmological constant to a positi
 ve value. In the last years it has become clear that the supergravity 
 description of this process reveals problematic features such as unwan
 ted singularities. Although this is a technical topic I will review it
  in a non technical fashion with an emphasis on the physics behind it.
  I will advocate the point of view that these singularities are easy t
 o interpret and signal the instability of the vacuum. If correct this 
 invalidates the original motivation for the landscape conjecture.&lt\;
 br&gt\;<br><br>
\n
URL:https://www.physics.wisc.edu/events/?id=3115
END:VEVENT
END:VCALENDAR