03/19 (목) 전문가초청특강은 한국표준과학연구원 차진웅 박사님을 모시고 진행합니다.

관심있는 분들의 많은 참석 부탁드립니다.

ㅁ주제: Integrating Nanoscale Devices for Quantum Information Technologies 

ㅁ일시: 03/19 (목) 16:00

ㅁ장소: 제2종합연구동 83188호

ㅁ약력: 

   ▷ 학사: 한양대학교 안산캠퍼스 기계공학 학사 (2011)
   ▷ 석사: 스위스취리히연방공과대학교 Micro and Nanosystems 석사 (2013)
   ▷ 박사: 스위스취리히연방공과대학교 기계공학 박사 (2018)
   ▷ 박사후연구원:
          - 캘리포니아공과대학 (2018),
          - 카이스트 정보전자연구소 (2018-2020),
          - 한국표준과학연구원 양자기술연구소 (2020)
   ▷ 현재:
          - 한국표준과학연구원 양자기술연구소 선임연구원 (2020 - 현재)
          - 연세대학교 융합반도체협동과정 겸직교수 (2023 - 현재)
          - 카이스트 양자대학원 겸직교수 (2023 - 현재)
  ▷ 연구분야:
초전도 회로, 나노역학소자, 나노광학소자를 이용한 하이브리드 양자소자 기반 양자컴퓨팅, 양자센싱, 양자인터커넥트 기술 개발
  ▷ 주요성과 (주/교신):
PNAS (2017), Nature Nanotechnology (2018), Nature (2018), Nano Letters (2021, 2022, 2024), Microsystems & Nanoengineering (2025)  

ㅁ초록:

One of the grand challenges in modern quantum technologies is improving the scalability of quantum computing systems. Superconducting quantum computing, one of the leading platforms for realizing large-scale quantum processors with thousands of qubits, faces several technical challenges stemming from its reliance on millikelvin-level cryogenic environments. These challenges include replacing bulky microwave electronics that occupy significant physical space, reducing the large number of metallic microwave cables inside cryogenic refrigerators, decreasing the footprint of cryogenic microwave components required for routing, filtering, and amplifying control and readout signals, and ultimately enabling interconnections between quantum processor modules.
In this seminar, I will present our recent efforts to address these challenges by integrating several nanoscale device platforms, including superconducting microwave circuits, nanoelectromechanical systems, and nanophotonic devices. I will first describe niobium-based superconducting microwave optomechanical circuits, in which a gigahertz-frequency superconducting resonator couples to a nanoelectromechanical resonator. This platform exploits strong optomechanical interactions to suppress thermomechanical transduction noise in microwave-to-optical conversion and to enable microwave pulse generation and stabilization for operating superconducting quantum processors.
The second part of the talk will focus on a silicon photonic device known as an optomechanical crystal, developed for photon–phonon transduction. This device utilizes both photonic and phononic band gaps to tightly confine optical fields and mechanical vibrations within the same nanoscale volume, enabling strong coupling between telecommunication-band light and gigahertz-frequency mechanical modes. I will discuss the optical and mechanical properties of these devices and their interactions at cryogenic temperatures, which are essential for integration with superconducting quantum systems.