| ABSTRACT: |
Gravitational lensing by large-scale-structure slightly
perturbs the paths of CMB photons as they travel to us
from the surface of last scattering. Although the effect
is quite subtle, current experiments such as ACT, SPT,
and Planck have the ability to detect this lensing at
high significance, and even to make maps of the integrated
line-of-sight matter distribution, with a kernel peaking
at z ~ 2. Upcoming polarization experiments will do
even better. I will review the methodology for lens
reconstruction using CMB data, and discuss what
we can expect from lensing in the near future.
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kek.jp 