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SUMMARY:CMB Lensing: Fundamental Physics from Maps of the Invisible - Blak
 e Sherwin (DAMTP)
DTSTART:20171123T160000Z
DTEND:20171123T170000Z
UID:TALK95521@talks.cam.ac.uk
CONTACT:28811
DESCRIPTION:Dark matter not only forms an invisible cosmic scaffolding wit
 hin which\ngalaxies form\, its distribution in the universe also contains 
 a wealth of\ninformation about neutrinos\, dark energy\, and physics at t
 he earliest times.\nMeasurements of gravitational lensing in the cosmic mi
 crowave background\n(CMB) allow this matter distribution to be directly se
 en and mapped.  In my\ntalk\, I will first discuss recent measurements o
 f CMB lensing and their\nscientific implications. I will then explain why 
 upcoming measurements of\nthe CMB lensing signal\, with experiments such a
 s AdvancedACT and Simons\nObservatory\, will be remarkably powerful probes
  of cosmology. Lensing is not\nonly a signal\, however\, but also a source
  of noise that limits how much we\ncan learn about the very early universe
 . With illustrations from recent\nwork\, I will explain why delensing - re
 moving the lensing effect to reveal\nthe primordial sky - is crucial for t
 he future of CMB cosmology.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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