Hyunseong Kim
Ph.D. student in Applied Physics at Rice University
CV (PDF) · GitHub · LinkedIn · ORCID
I am a Ph.D. student in the Quantum Complexity Theory group at Rice University, advised by Prof. Nai-Hui Chia. I study quantum algorithms, quantum circuit complexity, and Hamiltonian simulation, with an interest in the resource requirements and numerical reliability of quantum algorithms.
I received my B.S. in Physics and Photonics with a minor in Mathematics from Gwangju Institute of Science and Technology (GIST) in 2025. Before joining Rice, I worked on quantum simulation, Pauli-frame methods, computational materials research, and Trotter-circuit optimization.
Email: hk81@rice.edu
Research interests
- Quantum algorithms: Hamiltonian dynamics, Krylov-subspace methods, and Trotterization.
- Quantum complexity: circuit depth, sampling complexity, constant-depth constructions, unitary designs, and scrambling.
- Numerical analysis: perturbation bounds, error propagation, and stability in Gram-matrix, reduced-Hamiltonian, and observable estimation.
Selected research software
Tensorized Pauli Composer
An algorithm for constructing Hamiltonian matrices from weighted Pauli polynomials using symplectic representations and inverse tensorized Pauli decomposition. Presented at Quantum Threads 2024.
Code · Technical preprint
OptTrot
Python and C routines for Pauli algebra, Hamiltonian decomposition, operator conversion, and Trotter-circuit generation.
Code
TorchPenny
A framework for composing PennyLane quantum circuits with PyTorch modules and computation workflows.
Code
Personal projects
Outside research, I am a personal book-lover and bookbinding researcher. Though HornPenguin, I develop and distribute my open-source tools and documentations related to publishing, printing, bookbinding.
Booklet is my open-source tool for arranging PDF pages into printable booklets and folded signatures.
한국의 철장(Korean Metal Binding Manuscript) is a database project documenting artifacts, manuscripts, and images related to traditional Korean metal binding.