[Joint CQSE & NCTS Seminar] Harnessing Hybrid Frequency-Entangled Qudits through Quantum Interference

• Event Date: 2025-10-17
• Chen, Jhan Yu 陳詹喻
• Quantum Information and Quantum Computing Quantum computing and interdisciplinary applications
• Speaker: 蔡秉儒助理教授（中央大學光電系）  /  Host: Prof. Hsi-Sheng Goan
  Place: Rm. 104, Chin-Pao Yang Lecture Hall, Department of Physics/CCMS, NTU

Title: [Joint CQSE & NCTS Seminar] Harnessing Hybrid Frequency-Entangled Qudits through Quantum Interference
Speaker: 蔡秉儒助理教授（中央大學光電系）
Time: 2025/10/17 (Fri.) 14:20-16:20
Place: Rm. 104, Chin-Pao Yang Lecture Hall, Department of Physics/CCMS, NTU
Online: https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=m35c57ceb3c91fd5af3ca30d927e989a1
 

Abstract

High-dimensional (HD) quantum entanglement expands the Hilbert space, offering a robust framework for quantum information processing with enhanced capacity and error resilience. In this work, we present a novel HD frequency-domain entangled state, the hybrid frequency-entangled qudit (HFEQ), generated via Hong-Ou-Mandel (HOM) interference, exhibiting both discrete-variable (DV) and continuous-variable (CV) characteristics in the frequency domain. By tuning HOM interference, we generate and control HFEQs with dimensions D = 5, 7, 9, 11, confirming their DV nature. Franson interferometry confirms the global frequency correlations with visibility exceeding 97.6±0.6% and verifies the CV entanglement within individual frequency modes with visibility greater than 95%. Our findings provide deeper insight into the physical nature of frequency-entangled qudits generated by quantum interference and introduce a novel resource for HD time-frequency quantum information processing.
 
Reference: Wang, Sheng-Hung, et al. "Harnessing Hybrid Frequency-Entangled Qudits through Quantum Interference." arXiv preprint arXiv:2503.00362 (2025).
 

Biography

https://scholars.ncu.edu.tw/zh/persons/pin-ju-tsai