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Explore the stochastic gravitational wave background and its detection through pulsar timing arrays in this comprehensive lecture from the Prospects in Theoretical Physics 2025 program. Delve into advanced concepts of gravitational wave astronomy as presented by Bruce Allen from the Max Planck Institute for Gravitational Physics at the Institute for Advanced Study. Examine the theoretical foundations and observational techniques used to detect the stochastic background of gravitational waves that permeates the universe, focusing on how pulsar timing arrays serve as sensitive detectors for these low-frequency signals. Learn about the statistical methods and data analysis approaches required to extract weak gravitational wave signals from pulsar timing data, and understand the implications of recent discoveries in this rapidly evolving field of astrophysics.
