Ruishen Zhao

Email: zrs13@tsinghua.org.cn

About Ruishen Zhao

My name is Ruishen Zhao. From September 2022 to June 2025, I was a postdoctoral fellow at the Morningside Center of Mathematics, mentored by Yichao Tian. Since September 2025, I have been a postdoctoral fellow at the Yau Mathematical Sciences Center (Tsinghua University), mentored by Hansheng Diao.

Wir müssen wissen. Because it's there.

Research & Interests

Broadly speaking, my research interests lie in p-adic automorphic forms, eigenvarieties, and Shimura varieties. A central theme of my work is the arithmetic of motives, especially their p-adic variation.

Preprints and publications

Perfectoid unitary Shimura varieties and p-adic Eichler-Shimura map II (in progress)
Perfectoid unitary Shimura varieties and p-adic Eichler-Shimura map I
PDF arXiv
p-adic level raising on the eigenvariety for U(3)
PDF arXiv
Bruhat-Tits building and p-adic period domains (Joint work with Xu Shen)
PDF arXiv
Special cycles on Orthogonal Shimura varieties
arXiv

Selected Talks

Overconvergent Eichler-Shimura theory and geometry of eigenvarieties Postdoc workshop II, YMSC Tsinghua University, 2026 April.
PEL type Shimura varieties and Serre-Tate theory (following Zhang2023) Fall Seminar on Igusa stack, BICMR Peking University, 2025 September.
Locally analytic vectors of the completed cohomology of modular curves (Introduce Pan2022) Seminar on Pan Lue's work, YMSC Tsinghua University, 2025 September.
Perfectoid unitary Shimura varieties and Overconvergent Eichler-Shimura map Workshop on Arithmetic Geometry and Representation Theory, Harbin Institute of Technology, June 2025.
Slides
Bruhat-Tits building and p-adic period domain (Joint work with Xu Shen) Postdoc workshop, Yau Mathematical Sciences Center (YMSC), Tsinghua University, May 2025.
Slides
Categorical trace and its applications (following Zhu2018) Spring Seminar on geometry of Shimura varieties, BICMR Peking University, 2025 April.
p-adic level raising on definite unitary groups AAAAA Seminar, Morningside Center of Mathematics (MCM), February 2025.
Slides
Special cycles on Shimura varieties with norm relations MCM Seminar, Morningside Center of Mathematics, 2022 November.