BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:SCAPEZILLA: the backreaction of antibranes in flux compactificatio
 ns - Iosif Bena (Saclay)
DTSTART:20121025T120000Z
DTEND:20121025T130000Z
UID:TALK41182@talks.cam.ac.uk
CONTACT:Sungjay Lee
DESCRIPTION:I will discuss the backreaction of anti-D3 branes in geometrie
 s with D3 brane charge dissolved in fluxes\, and I will show that these so
 lutions must have a certain singularity in the infrared. Since singular so
 lutions must normally be discarded unless there is a compelling physical r
 eason to accept the singularity\, I will discuss possible mechanisms for i
 ts resolutions\, and show that none work. If this singularity is not physi
 cal this will imply that the mechanism for uplifting AdS vacua (which are 
 ubiquitous in flux compactifications of string theory) to dS vacua by plac
 ing antibranes does not work\, and hence string theory does not have a lan
 dscape of dS vacua.
LOCATION:Potter Room (first floor\, Pav. B)
END:VEVENT
END:VCALENDAR