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Explore advanced theoretical physics concepts in this 45-minute conference talk examining the role of timelike boundaries in cosmological models and their implications for understanding the universe's topology. Delve into recent constraints on timelike boundaries in the observable universe derived from CMB and BAO data, incorporating UV sensitive effects that challenge assumptions about closed universe models. Learn how these boundaries function within holographic frameworks, where they incorporate multiplicities of states and contribute to concrete microstate counts for timelike-bounded de Sitter static patches in four dimensions. Discover the construction of thermofield doubles to generate cosmological future wedges and examine methods for introducing constraints in Hamiltonian systems to capture tall states where boundaries maintain causal contact. Gain insights into cutting-edge research connecting quantum aspects of black holes and spacetime with late-time cosmological evolution, including ongoing work on deforming timelike bounded theories to Cauchy slice holography as an alternative approach to reaching the future wedge.
