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Learn about gravitational waves in this lecture from the "Hearing beyond the standard model with cosmic sources of Gravitational Waves" program at the International Centre for Theoretical Sciences. Explore the experimental detection of gravitational waves from merging black holes and neutron stars, and understand their significance in probing physics beyond the Standard Model. Examine various sources of gravitational waves including inflation-related tensor perturbations, Primordial Black Holes (PBH), cosmological first-order Phase Transitions, and topological defects like cosmic strings and domain walls. Discover how the detection of Stochastic Gravitational Wave Background (SGWB) by collaborations like NANO-Grav and InPTA helps investigate high-scale physics phenomena that may be unreachable through conventional experiments. Delve into the implications of gravitational wave detection for understanding potential modifications to general relativity and their role in advancing our knowledge of fundamental physics and cosmology.
