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Watch a 22-minute physics lecture exploring gravitational waves at frequencies above the LIGO band, delivered by Northwestern University's Nancy Aggarwal as part of Harvard CMSA's series on Phase Transitions and Topological Defects in the Early Universe. Discover how high-frequency gravitational waves can reveal new information about cosmological phenomena, ultralight bosons through blackhole superradiance, and light primordial blackholes. Learn about an innovative global initiative studying gravitational waves at ultra-high-frequencies (MHz-GHz) and explore the development of a new experiment at Northwestern University that uses levitated optomechanical sensors to detect gravitational waves in the 10 kHz to 300 kHz range. Gain insights into the experimental design, current progress, and future improvements of this cutting-edge research in astrophysics and cosmology.
