[Sep.29] Physics Special Seminar - Dr. Wonjin Jang (École Polytechniqu…

물리학과 특별세미나 안내

물리학과에서는 아래와 같이 특별세미나를 개최하오니, 관심 있는 분들의 많은 참여를 부탁드립니다.

○ 연사: 장원진 박사 (École Polytechnique Fédérale de Lausanne (EPFL), Switzerland)
○ 일시: 2025. 9. 29(월), 오후 4시
○ 장소: 공학3동 302호 (세미나실)

○ 제목: Quantum science and technology in super-semi hybrid quantum devices

○ 문의처: 물리학과 행정팀 (T.054-279-3711)

Recent advances in optics, electronics, and materials engineering have enabled successful demonstrations of artificial quantum systems. These systems allow the exploration of various quantum phenomena with potential applications across multiple quantum technologies. This talk will discuss quantum science and technology in artificial solid-state quantum systems, specifically realized with gate-defined semiconductor quantum dots (QDs) and superconductors. Starting with a brief introduction to the electronic spin states in gate-defined QDs, I will focus on superconductor-semiconductor hybrid quantum devices. In particular, semiconductor QDs embedded in a superconducting cavity can interact with the microwave photons in the cavity, facilitating coherent link between remote QD spins, and enabling applications in quantum optics and simulations. The talk will highlight the demonstration of strong hole charge-photon coupling exploiting a high-impedance Josephson junction array cavity, and high-efficiency microwave photon detection achieved in the near ultra-strong charge-photon coupling limit. I will also briefly show QDs directly coupled to superconducting contacts, which offer intriguing avenues for exploring Andreev physics and realizing novel quantum device architectures. The final part of the talk will outline the outlook for solid-state quantum devices, focusing on the potential phenomena and applications that can be explored within these hybrid architectures.

Announcement on Physics Special Seminar

The Department of Physics will hold a Special Seminar as follows. The Special Seminar is open to all POSTECH members. Your participation will be greatly appreciated.

○ Speaker: Dr. Wonjin Jang (École Polytechnique Fédérale de Lausanne (EPFL), Switzerland)

○ Date(Time): Monday, September 29, 2025 (4:00 p.m.)

○ Place: Science Bldg. III, Room 302

○ Title: Quantum science and technology in super-semi hybrid quantum devices

○ Contact: Department of Physics Administrative Office (T.054-279-3711)

Recent advances in optics, electronics, and materials engineering have enabled successful demonstrations of artificial quantum systems. These systems allow the exploration of various quantum phenomena with potential applications across multiple quantum technologies. This talk will discuss quantum science and technology in artificial solid-state quantum systems, specifically realized with gate-defined semiconductor quantum dots (QDs) and superconductors. Starting with a brief introduction to the electronic spin states in gate-defined QDs, I will focus on superconductor-semiconductor hybrid quantum devices. In particular, semiconductor QDs embedded in a superconducting cavity can interact with the microwave photons in the cavity, facilitating coherent link between remote QD spins, and enabling applications in quantum optics and simulations. The talk will highlight the demonstration of strong hole charge-photon coupling exploiting a high-impedance Josephson junction array cavity, and high-efficiency microwave photon detection achieved in the near ultra-strong charge-photon coupling limit. I will also briefly show QDs directly coupled to superconducting contacts, which offer intriguing avenues for exploring Andreev physics and realizing novel quantum device architectures. The final part of the talk will outline the outlook for solid-state quantum devices, focusing on the potential phenomena and applications that can be explored within these hybrid architectures.