Explore the intricacies of semi-classical physics at large quantum numbers in this 48-minute conference talk by Zohar Komargodski from the Simons Center for Geometry and Physics (SCGP). Recorded as part of the Spacetime and String Theory conference at the Kavli Institute for Theoretical Physics (KITP), delve into cutting-edge research bridging the gap between infrared and ultraviolet perspectives in string theory. Examine the interplay between quantum information, string compactification techniques, and holographic dualities beyond anti-de Sitter space. Gain insights into non-perturbative string theory, stringy constraints on effective field theory, and the connections between gravitational path integrals, higher topologies, and entanglement across energy scales. Enhance your understanding of recent advancements in theoretical physics and their implications for our comprehension of spacetime and fundamental forces.