“KMI colloquium” 10th Nov (Fri)  16：00 – 
Speaker: John Ellis (CERN & King’s College London)
Title: From Cold Atoms to Pulsar Timing Arrays: Looking for the Biggest Bangs since the Big Bang
Place: ES635& ZOOM

Abstract: Atom interferometry is a promising technique to search for gravitational waves (GWs) in frequency ranges not covered by laser interferometers. Pulsar Timing Array (PTA) Collaborations have recently reported the discovery of GWs in the nanoHz frequency range that might be due to supermassive black hole binary systems or cosmological sources involving physics beyond the Standard Model. Atom interferometers could help distinguish between these mechanisms, perhaps by observing the mergers of black holes much heavier than those measured by LIGO, Virgo and KAGRA.