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UID:www.tcs.tifr.res.in/event/1581
DTSTAMP:20250821T094538Z
SUMMARY:Accelerating Gravitational-Wave Inference with Reduced Order Surrog
 ate Models
DESCRIPTION:Speaker: Tousif Islam (University of California Santa Barbara)\
 n\nAbstract: \nWith nearly 100 detections of binary black hole mergers\, g
 ravitational-wave (GW) astronomy is now a data-rich field. Extracting info
 rmation from noisy GW signals requires accurate waveform models that descr
 ibe the radiation emitted during these mergers. The most accurate waveform
 s are generated through numerical relativity (NR)\, which involves solving
  Einstein's equations via large-scale simulations. While NR provides high-
 fidelity data\, each simulation is computationally expensive — often req
 uiring weeks to months of supercomputing time — making it impractical fo
 r real-time detection or Bayesian source characterization.\n \nIn this ta
 lk\, I will present how techniques from nonlinear reduced order modeling 
 — including the Discrete Empirical Interpolation Method — combined wit
 h physics-informed signal decomposition\, enable fast\, accurate surrogate
  models that compress high-dimensional NR waveforms into representations e
 valuable in milliseconds. I will describe the construction pipeline\, key 
 numerical techniques\, and the integration of these surrogates into GW dat
 a analysis. Finally\, I will demonstrate how they are enabling precision a
 strophysical inference at scale.\n \nShort Bio: \nTousif Islam is a Kavli
  Postdoctoral Scholar at the Kavli Institute for Theoretical Physics. His 
 research focuses on high-performance computing\, data science\, and gravit
 ational-wave astronomy\, particularly in building nonlinear reduced order 
 models and Bayesian inference frameworks. Tousif earned his PhD in Computa
 tional Sciences and MS in Data Science from the University of Massachusett
 s Dartmouth in 2023. During his PhD\, he held several competitive research
  fellowships and visiting positions\, including as a Kavli Graduate Fellow
  at KITP (UCSB)\, a predoctoral scholar at the NSF Institute for Pure and 
 Applied Mathematics (IPAM\, UCLA)\, a visiting researcher at the TAPIR gro
 up (Caltech)\, a semester visitor at the NSF Institute for Computational a
 nd Experimental Research in Mathematics (ICERM\, Brown)\, and a GravNet fe
 llow at the Niels Bohr Institute (University of Copenhagen). He holds a BS
 -MS in Physics from IISER Kolkata and was a Long-Term Student Fellow at IC
 TS-TIFR.\n
URL:https://www.tcs.tifr.res.in/web/events/1581
DTSTART;TZID=Asia/Kolkata:20250821T160000
DTEND;TZID=Asia/Kolkata:20250821T170000
LOCATION:A-201 Seminar Room
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