26.01.12 JC (Chanwoo Kim): Violation of Bell Inequality with Unentangled Photons

25.11.17 IS (Haeju Jung): Surface Codes for Quantum Error Correction

25.11.10 JC (Eunji Park): Application of ZNE to a Silicon Spin Qubit

25.07.28 IS (Chanwoo Kim): Photonic Quantum Computing

Quantum optics is the field of physics that studies optical phenomena which cannot be adequately explained by classical electromagnetic wave theory alone but instead requires a quantum description of light in terms of photons. By treating light in terms of photons. By treating light as a quantized field and analyzing its interaction with matter at the atomic level, quantum optics provides the foundation for understanding phenomena such as photon statistics, coherence, entanglement, and light-matter interaction.

This study is based on Quantum Optics: An Introduction by Mark Fox, which offers a clear and experimentally motivated introduction to the subject, bridging fundamental theory and real-world optical experiments by Chanwoo Kim.

DQQQ participated as a mentor in the BQIT(Basic Quantum Information Theory) study and Paper Study organized by QISCA. The mentor of BQIT study is Haeju Jung, and the mentor of paper study is Chanwoo Kim.

The BQIT study is designed to learn the fundamental theories of quantum information, covering a wide range of topics from basic alogorithms to mor advanced content.

The Paper study focuses on reading and discussign research paper on Quantum Communication and Quantum Key DIstribution(QKD). The goal is gaining deep knowledge of the topic and keeping up with the latest research trends.

We hosted a networking conference with D-orbital on August 27, 2025. The conference served as an opportunity to introduce DGIST undergraduates to the fields of quantum information and physics, as well as to ongoing research. At DQQQ, Chanwoo Kim, Eunji Park, and Haejoo Jung participated as speaker. Topics are 'Pratical Challenges in QKD and Their Solution, MDI-QKD', 'Error mitigation in QPE', and 'Toward Three-dimensional Surface Codes in Hyperbolic Space'. Through this conference, our goal was to raise awareness of quantum information and physics among undergraduates and to provide a first step for studying quantum information.

We participated in the 2025 Quantum Infomation Competition. The Quantum Information Research Support Center hosted tis competition. It took place over three days from June 29 to July 1, 2025. The team CHSH25(Chanwoo kim, Eunji park, Haeju jung, Hyeonju song, Sumin moon) participated in the challenge on the topic of Sample-based Quantum Algorithms. They researched way to improve the performance of the HHL algorithm through configuration recovery and won Excellence Award.