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B.S. in Physics

Korea Advanced Institute of Science and Technology (KAIST)

Physics

• Scientific Computing for Quantum Information Science (Graduate)
• Quantum Information I/II
• Quantum Mechanics I/II

• Thesis: Combinatorial Optimization on Neutral Atom Arrays: Problem Encoding, Noise Mitigation, and Approximate-Solution Performance Evaluation (Advisor: Prof. Jaewook Ahn)

Exchange Program

Nanyang Technological University (NTU)

Physics

Research Intern

Quantum Computing Lab (Prof. Jaewook Ahn), KAIST

• Developed an approximation-ratio-resolved shots-to-solution (STS) framework for hybrid neutral-atom optimization, modeling postprocessed outputs via a degeneracy-weighted Boltzmann shell distribution parameterized by a single quality parameter β̃.
• Introduced an excitation-matched random baseline β̃_rand(p_exc) to isolate genuine quantum structural exploitation from excitation-density effects, correcting a systematic confound in existing Rydberg benchmarking literature.
• Ran QuEra Aquila experiments (King's-lattice MIS, N ∈ [30, 125], 500 shots/instance) and measured Δβ̃_ann = 0.23–0.40 across all system sizes and hardness bins, confirming that adiabatic annealing genuinely exploits low-energy solution structure.
• Characterized the two-regime STS scaling: exponential in N for near-exact targets (r → 1), O(1) for relaxed targets, establishing the approximation-ratio dependence of the quantum advantage.
• Built a deterministic error-mitigation (DEM) pipeline for Rydberg MIS using a binomial Hamming-shell noise model and entropy-controlled classical baselines (2^{N H₂(p)} scaling); analyzed Pasqal Fresnel datasets and extracted instance-dependent success scaling.

Research Intern

Condensed Matter Theory Group (Prof. Gil Young Cho), KAIST

• Studied the behavior of the chiral central charge beyond strict entanglement-scaling laws, focusing on the structure and interpretation of subleading corrections.

Visiting Research Intern

The inQlings (Prof. Nelly Ng), NTU Singapore

• Investigated the gap between Thermal Operations (TO) and Gibbs-Preserving Covariant (GPC) channels in quantum resource theory.
• Produced an internal manuscript draft on catalysis-based approaches relating TO and GPC under robustness assumptions; conjectured that fully non-degenerate spectra make GPC equivalent to TO.

Research Intern

Quantum Computing Lab (Prof. Jaewook Ahn), KAIST

• Worked on Rydberg-atom graph constructions for QUBO problems on neutral-atom arrays; optimized atom arrangements and graph embeddings supporting the Advanced Quantum Technologies (2024) publication.

Selected Participant

KIAS–SNU Physics Winter Camp 2025

• Intensive program on New States of Quantum Matter and AI-driven physics.

Summer Student

Technical University of Denmark (DTU)

• Completed intensive graduate-level coursework on Scientific Methods for Quantum Information Science (5 ECTS).
• Project: implemented classical shadow tomography to detect the 1D transverse-field Ising phase transition, benchmarking shadow-estimated Rényi-2 entropy against exact diagonalization at g/J = 1. View code

Second Place Presentation Award

2025 CAMPUS Asia Joint Research Presentation, KAIST

Oral presentation among representatives from KAIST, NTU, and Science Tokyo: Exploring the Gap between Thermal Operations and Gibbs-Preserving Covariant Channels.

Shots-to-Approximate-Solution Scaling in Neutral-Atom Quantum Optimization

arXiv preprint

J. Jung and J. Ahn. arXiv:2608.12858

Quantum-Enhanced Deterministic Inference of k-Independent Set Instances on Neutral Atom Arrays

arXiv preprint

J. Park, J. Jung, and J. Ahn. arXiv:2602.05432

Rydberg-atom graphs for quadratic unconstrained binary optimization problems

Advanced Quantum Technologies, 2300398

A. Byun, J. Jung, K. Kim, M. Kim, S. Jeong, H. Jeong, and J. Ahn.