BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//INPA - ECPv6.8.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://inpa.lbl.gov
X-WR-CALDESC:Events for INPA
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20180311T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20181104T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20181214T120000
DTEND;TZID=America/Los_Angeles:20181214T130000
DTSTAMP:20260526T152244
CREATED:20181017T175956Z
LAST-MODIFIED:20181207T192951Z
UID:457-1544788800-1544792400@inpa.lbl.gov
SUMMARY:Kimmy Wu (KICP Chicago) - Delensing\, Neural Networks\, the H_0 problem — a perspective from the CMB
DESCRIPTION:The cosmic microwave background (CMB) contains a wealth of information about the early and the late universe. In this talk\, I will focus on the search of primordial gravitational waves. Specifically\, I will talk about “delensing” — constraining the lensing component in the CMB B-mode maps that we might reduce the soon-to-be major uncertainty of the r measurement in the BICEP/Keck experiments. For next-generation CMB experiments\, we will need higher signal-to-noise estimates of the lensing potential beyond the commonly-used quadratic estimator approach today for delensing. I will discuss a method to extract the lensing field using a convolutional neural network (1810.01483)\, that approaches maximum-likelihood lensing estimates in a broad range of angular scales. If I have time\, I will discuss the “H_0 problem”\, where the inferred expansion rate of the universe from the CMB (and a couple other probes) are significantly lower than direct measurements. I will look at it from the sound horizon perspective (1811.00537) and show how data from the South Pole telescope can probe potential new physics.
URL:https://inpa.lbl.gov/event/kimmy-wu-kicp-chicago/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
END:VEVENT
END:VCALENDAR