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Explore the intersection of quantum mechanics and fundamental physics through this comprehensive lecture on quantum sensing applications. Learn how quantum sensors can probe the deepest questions in physics, from testing general relativity to searching for dark matter and detecting gravitational waves. Discover the theoretical foundations of quantum sensing, including the principles of quantum metrology, entanglement-enhanced measurements, and the quantum Fisher information framework. Examine cutting-edge experimental techniques such as atomic interferometry, trapped ion systems, and superconducting quantum devices that enable unprecedented precision in measuring physical phenomena. Understand how quantum sensors surpass classical measurement limits through quantum correlations and squeezed states, and investigate their role in detecting beyond-standard-model physics including axions, dark photons, and violations of fundamental symmetries. Analyze the challenges and opportunities in scaling quantum sensing technologies for large-scale fundamental physics experiments, and explore the future prospects for quantum-enhanced detection of elusive phenomena that could revolutionize our understanding of the universe.
