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Explore how optical atomic clocks serve as precision instruments for testing fundamental physics in this 20-minute conference talk. Discover three cutting-edge experimental platforms developed at JILA and UC Berkeley, including a Wannier–Stark strontium optical lattice clock achieving record-breaking stability and accuracy for gravitational redshift measurements at sub-millimeter scales, an entangled optical clock using quantum spin squeezing to surpass standard quantum limits, and a multi-ensemble optical lattice clock capable of applying large accelerations to strontium atoms. Learn how these tabletop experiments bridge quantum mechanics and gravity, revealing first signatures of nonclassical proper time evolution while demonstrating entanglement generation and frequency synchronization through the interplay of quantum mechanics, gravitational effects, and photon-mediated interactions.
