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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-6285
DTSTART:20210219T200000Z
DTEND:20210219T210000Z
DTSTAMP:20260415T003444Z
LAST-MODIFIED:20210218T181106Z
LOCATION:For zoom link\, sign up at: https://groups.google.com/a/g-gro
 ups.wisc.edu/d/forum/theoryseminars/join
SUMMARY:Resolving spacetime singularities in flux compactifications an
 d KKLT\, Theory Seminar (High Energy/Cosmology)\, Jakob Moritz\, Corne
 ll University
DESCRIPTION:I explain how string theory resolves ubiquitous singularit
 ies in type IIB flux compactifications (and eventually KKLT de Sitter 
 vacua) via effects that are non-perturbative in the \\alpha' expansion
  of string theory. I will show that these can be understood in detail 
 by mapping them to well known gauge instanton effects in pure 4d N=2 Y
 ang-Mills theory. A perhaps surprising consequence is that the naively
  'elementary' D7 brane of type IIB string theory is properly thought o
 f as a bound state of two mutually non-local cosmic defects in six dim
 ensions upon compactification on a curved 4-manifold. Finally\, I will
  argue that the resolution described indicates that KKLT de Sitter vac
 ua can be controlled by a small flux superpotential although the K\\"a
 hler potential may in general receive large corrections which are diff
 icult to compute.
URL:https://www.physics.wisc.edu/events/?id=6285
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