Overview

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.

Invited Speakers

Po-Yao Chang (National Tsing Hua University)

Harry Goodhew(National Taiwan University)

Masaru Hongo (Niigata University)

Kohei Kawabata (Institute for Solid State Physics, University of Tokyo)

Takato Mori (Rikkyo University)

Tomoki Ozawa (Advanced Institute for Materials Research, Tohoku University)

Guilherme Leite Pimentel(Pisa, Scuola Normale Superiore)* Online

Jiro Soda (Kobe University) 

Zimo Sun (Institute for Advanced Study, Princeton University)* Online

Yuichiro Tada (Rikkyo University)

Kazuaki Takasan (University of Tokyo)

Tadashi Takayanagi (Yukawa Institute for Theoretical Physics, Kyoto University)

Masataka Watanabe (University of Tokyo) 

Zixia Wei (Yukawa Institute for Theoretical Physics, Kyoto University) 

Schedule