Junyeong Ahn
- Assistant Professor
- Physics
Currently recruiting graduate students.
Contact Information
PMA
Room Number:13.318
Research
Junyeong Ahn conducts theoretical research on a broad spectrum of quantum phenomena in condensed matter systems, ranging from topological phases, many-body correlations, and quantum light-matter interactions. His research aims to uncover and elucidate the functional properties of quantum materials by integrating insights from condensed matter physics, quantum optics, and quantum information science. Recently, his research has focused on investigating the electromagnetic response properties of quantum materials, with a particular focus on the geometric and topological aspects of quantum states.
Research Areas
- Materials Science
- Quantum Information or Computing
Fields of Interest
- Condensed Matter Physics
- Computational/Theoretical
Centers and Institutes
- Center for Complex Quantum Systems
- Texas Quantum Institute
Education
- Postdoc, Harvard University, 2020-2024
- Postdoc, RIKEN Center for Emergent Matter Science/The University of Tokyo, 2020
- Ph. D., Seoul National University, 2020
Publications
Selected Publications
- J. Ahn and B. Ghosh, “Topological circular dichroism in chiral multifold fermions”, Physical Review Letters 131, 116603 (2023).
- J. Ahn, S.-Y. Xu, and A. Vishwanath, “Theory of optical axion electrodynamics and application to the Kerr effect in topological antiferromagnets”, Nature Communications 13, 7615 (2022).
- J. Ahn, G.-Y. Guo, N. Nagaosa, and A. Vishwanath, “Riemannian geometry of resonant optical responses”, Nature Physics 18, 290 (2022).
- J. Ahn and N. Nagaosa, “Theory of optical responses in clean multiband superconductors”, Nature Communications 12, 1617 (2021).
- J. Ahn, G.-Y. Guo, and N. Nagaosa, “Low-frequency divergence and quantum geometry of the bulk photovoltaic effect in topological semimetals”, Physical Review X 10, 041041 (2020).
- J. Ahn, S. Park, and B.-J. Yang, “Failure of Nielsen-Ninomiya theorem and fragile topology in two-dimensional systems with space-time inversion symmetry: application to twisted bilayer graphene at magic angle”, Physical Review X 9, 021013 (2019).