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Learn about the correlation between gravitational wave and gamma-ray signals from primordial black holes in this 32-minute physics lecture from Harvard CMSA's "Phase Transitions and Topological Defects in the Early Universe" series. Explore how asteroid-mass primordial black holes (PBHs) could explain dark matter abundance while remaining consistent with current indirect detection constraints. Discover how Hawking radiation from these PBHs produces gamma-ray signals detectable by future AMEGO and e-ASTROGAM experiments, and understand their connection to stochastic gravitational wave backgrounds observable by future detectors like LISA, DECIGO, BBO, and the Einstein Telescope. Examine how the correlation between gamma-rays and gravitational waves can provide definitive evidence for PBHs and enable precise measurements of primordial curvature perturbations responsible for their formation.
