Explore a 45-minute conference talk on the accurate determination of the fine-structure constant using atom interferometry, presented by Saïda Guellati-Khelifa from LKB/Sorbonne. Delivered as part of the Frontiers of Quantum Metrology conference at the Kavli Institute for Theoretical Physics, this presentation delves into the latest advancements in quantum metrology and its applications in fundamental physics. Gain insights into the intersection of optics, condensed matter, atomic physics, quantum information, particle physics, and gravitational physics. Discover how precision quantum sensors are being utilized in dark matter searches and gravitational wave detection. Learn about the unexpected connections between quantum metrology methods and various fields of physics, and understand the importance of cross-disciplinary collaboration in driving scientific discoveries.