de la Fuente, AntonThis thesis considers non-perturbative methods in quantum field theory with applications to gravity and cosmology. In particular, there are chapters on black hole holography, inflationary model building, and the conformal bootstrap.enNon-Perturbative Methods in Quantum Field Theory and Quantum GravityDissertationPhysicsTheoretical physicsQuantum physicsBlack HolesConformal Field TheoryCosmologyNon-PerturbativeQuantum Field TheoryQuantum Gravity