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DTSTART;TZID=America/New_York:20231024T110000
DTEND;TZID=America/New_York:20231024T120000
DTSTAMP:20260419T194709
CREATED:20240223T053357Z
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UID:10002817-1698145200-1698148800@cmsa.fas.harvard.edu
SUMMARY:Resolving memory in numerical relativity\, and fixing BMS frames for modeling
DESCRIPTION:General Relativity Seminar \nSpeaker: Leo Stein (Mississippi) \nTitle: Resolving memory in numerical relativity\, and fixing BMS frames for modeling \nAbstract: Numerical relativity waveforms serve as ground truth for detection and parameter estimation of binary black hole mergers. Most NR waveforms to date miss memory effects\, as they were extracted from simulations using an approximation called extrapolation. I will report on the SXS collaboration’s capacity to resolve memory effects in production NR simulations using Cauchy-characteristic evolution (CCE)\, and in the future with Cauchy-characteristic matching (CCM). I will further report on how BH perturbation and post-Newtonian theory furnish natural BMS frames. With these BMS frames\, we can extract well-defined remnant quantities\, perform precision ringdown modeling\, and build complete surrogate waveform models that capture memory effects.
URL:https://cmsa.fas.harvard.edu/event/gr_102423/
CATEGORIES:General Relativity Seminar
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DTSTART;TZID=America/New_York:20231024T123000
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UID:10002837-1698150600-1698154200@cmsa.fas.harvard.edu
SUMMARY:CMSA Q and A Seminar 10/24/23
DESCRIPTION:CMSA Q and A Seminar \nSpeakers: Xi Yin (Harvard Physics) and Peter Kronheimer (Harvard Math)\n\nTopics:\nXi Yin: What is string field theory?\nPeter Kronheimer: What is Seiberg-Witten theory?
URL:https://cmsa.fas.harvard.edu/event/cmsaqa_102423/
LOCATION:Common Room\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:CMSA Q&A Seminar
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