De Sitter Holography Meets Non-Hermitian Quantum Matter

Understanding quantum gravity in de Sitter (dS) space remains a central challenge in cosmology and high-energy theory. While the dS/CFT proposal offers an organizing principle, its dual description is generically non-unitary, forcing us to rethink what we mean by dynamics, observables, and consistency when unitarity is not available. In parallel, condensed-matter theory has developed powerful frameworks for non-unitary physics via non-Hermitian Hamiltonians and field theories, revealing systematic structures such as complex spectra, biorthogonal formalisms, generalized symmetries (e.g., PT/pseudo-Hermiticity), exceptional points, and non-Hermitian topology. This workshop brings these communities together to test whether modern non-Hermitian tools can sharpen dS/CFT: clarifying the interpretation of non-unitary dynamics, identifying dS counterparts of non-Hermitian structures, and formulating concrete cross-field problems that can seed new collaborations.