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X-WR-CALDESC:Events for INPA
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TZOFFSETFROM:-0800
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DTSTART:20180311T100000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20181207T120000
DTEND;TZID=America/Los_Angeles:20181207T130000
DTSTAMP:20260526T143122
CREATED:20180917T155453Z
LAST-MODIFIED:20181207T191859Z
UID:438-1544184000-1544187600@inpa.lbl.gov
SUMMARY:Carlos García García (IFF\, Madrid) - Theoretical priors for quintessence
DESCRIPTION:Dark energy is a key unsolved problem. An enormous number of theories try to explain the accelerated expansion of the universe\, ranging from the simplicity of a cosmological constant to the inclusion of new gravitational fields that affect space-time dynamics. We need clever methods to test the landscape of theories to make the most of next-generation experiments. I will present a novel framework to study dark energy and apply it to general quintessence models\, reducing their functional freedom. Expanding the dark energy density as a truncated polynomial series\, we are able to reproduce the observables with less than 1% error\, with just 2 parameters. This economic yet precise description will allow dark energy to be constrained with next generation instruments in a general and efficient way.
URL:https://inpa.lbl.gov/event/carlos-garcia-garcia-iff-madrid/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20181214T120000
DTEND;TZID=America/Los_Angeles:20181214T130000
DTSTAMP:20260526T143122
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
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20181221T120000
DTEND;TZID=America/Los_Angeles:20181221T130000
DTSTAMP:20260526T143122
CREATED:20181017T180340Z
LAST-MODIFIED:20181017T180340Z
UID:465-1545393600-1545397200@inpa.lbl.gov
SUMMARY:Holiday - Shutdown
DESCRIPTION:
URL:https://inpa.lbl.gov/event/holiday-shutdown-2/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20181228T120000
DTEND;TZID=America/Los_Angeles:20181228T130000
DTSTAMP:20260526T143122
CREATED:20181017T180159Z
LAST-MODIFIED:20181017T180159Z
UID:461-1545998400-1546002000@inpa.lbl.gov
SUMMARY:Holiday - Shutdown
DESCRIPTION:
URL:https://inpa.lbl.gov/event/holiday-shutdown/
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