Hong-Yi Zhang

Welcome!

Portrait of theoretical physicist Hong-Yi Zhang

I am a physicist working on theoretical cosmology and astroparticle physics. My research focuses on some of the most captivating and complex challenges in fundamental physics, such as dark matter, ultralight particles and fields, astrophysical compact objects, complex systems, and nonlinear dynamics. More about my research →

While these topics drive my academic passion, I am also excited about the broader realms of physics and interdisciplinary collaborations. Outside physics, I am also an amateur pianist. If you have intriguing ideas or projects that intersect with my interests, I would be thrilled to engage in a discussion!

Latest news

  • Sep 2026 — A new dark-matter test is on arXiv!
    Can neutron-star transients uncover heavy dark matter? My new preprint with Ziwen Yin at Tsung-Dao Lee Institute explores this exciting possibility.
  • Aug 2026 — When stars dim into axions
    I brought a time-domain window on new physics to Qingdao, giving an invited talk at the 5th International Conference on Axion Physics and Experiment on searching for axions through changes in starlight.
  • Jul 2026 — Taking axion searches to Florence
    I shared our work on magnetic white dwarfs as axion laboratories at Exploring New Frontiers in Cosmology, a workshop at the Galileo Galilei Institute in Florence.

All activities →

Professional appointments & education

Contact & profiles