[Joint CQSE & NCTS Seminar] Microwave memory based on quantum interference in a superconducting atom

• Event Date: 2025-05-09
• Chen, Jhan Yu 陳詹喻
• Quantum Information and Quantum Computing Quantum computing and interdisciplinary applications
• Speaker: Prof. Yung-Fu Chen (National Central University)  /  Host: Prof. Hsi-Sheng Goan
  Place: NCTS Physics Lecture Hall, 4F, Chee-Chun Leung Cosmology Hall, NTU

Title: [Joint CQSE & NCTS Seminar] Microwave memory based on quantum interference in a superconducting atom
Speaker: Prof. Yung-Fu Chen (National Central University)
Time: 2025/05/09 (Fri.) 14:30-15:30
Place: NCTS Physics Lecture Hall, 4F, Cosmology Hall, NTU
Online: https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=m2a963d31adcf732fcddcf95022ff7210
 

Abstract

Microwave quantum memory is a fundamental component for realizing large-scale quantum networks based on superconducting circuits. In this presentation, we report the experimental implementation of a microwave quantum memory based on electromagnetically induced transparency (EIT) in a superconducting artificial atom. The storage efficiency is currently limited by incomplete temporal compression of the input coherent microwave pulse within the single-atom medium and by bidirectional photon emission. To overcome these challenges, we propose a novel storage scheme employing a chiral artificial atom that harnesses quantum interference effects analogous to EIT. This architecture enables full temporal compression and enforces unidirectional emission, thereby achieving near-unity storage efficiency. Furthermore, we introduce a deterministic single-photon source capable of generating shaped pulse profiles, establishing a platform for future studies on the interaction between microwave quantum memories and genuine quantum light. Our ongoing efforts focus on enhancing the storage efficiency and fidelity of the memory system, as well as investigating its response to non-classical light fields.
 

Biography

Yung-Fu Chen

Education
Ph.D. in Physics, University of Maryland, College Park (08/2000 – 04/2006)
B.S. in Physics, National Taiwan University (10/1994 – 06/1998)

Work Experience
Professor 
Department of Physics, National Central University (08/2023 – present)
Associate Professor 
Department of Physics, National Central University (08/2017 – 07/2023)
Assistant Professor 
Department of Physics, National Central University (08/2011 – 07/2017)
Postdoctoral Research Associate
Department of Physics, University of Wisconsin-Madison (05/2009 – 06/2011)
Postdoctoral Research Associate
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign (05/2006 – 05/2009)

Recent Research Focus
Superconducting circuits
Quantum control and sensing