[NCTS Physics Research Highlights] Meng-Ru Wu 'Robust Integration of Fast Flavor Conversions in Classical Neutrino Transport' Phys. Rev. Lett. 134, 051003 (2025)

• 2025-02-17
• Chen, Jhan Yu 陳詹喻
• High energy phenomenology High Energy Physics and Astrophysics

Robust Integration of Fast Flavor Conversions in Classical Neutrino Transport

Zewei Xiong, Meng-Ru Wu*, Manu George, and Chun-Yu Lin
Phys. Rev. Lett. 134, 051003 (2025)
DOI: https://doi.org/10.1103/PhysRevLett.134.051003

邁向破解宇宙中劇烈天文爆炸事件內之微中子量子難題
物理學家對於超新星爆炸和雙中子星合併等宇宙中劇烈的爆炸現象的了解，一直因為對其內扮演關鍵角色的微中子集體量子振盪行為無法掌握而難以完備。中心科學家中研院物理所吳孟儒副研究員與合作者（德國亥姆霍茲重離子研究中心熊澤瑋博士，中研院物理所曼魯喬治博士和台灣高速電腦中心林俊鈺副研究員），近期在破解這一難題上取得了突破。通過精密的量子動力學傳輸模擬，他們發現，考慮微觀尺度重要相關量子振盪現象在天文尺度下的平均結果，能讓量子效應被一種簡單的等效古典模型精確描述。這一創新方法大幅減少了計算上的需求，讓包含量子效應的天文模擬可望得以進行，以期達成我們對這些劇烈爆炸事件的完整理解。研究成果於2025年2月7日發表在《物理評論快報》（Physical Review Letters）。

Toward Cracking the Neutrino Quantum Problem Behind Nature’s Most Explosive Events
Achieving a full understanding of the most catastrophic cosmic events—like supernovae and neutron star mergers—has long been hindered by the mysterious quantum behavior of neutrinos, tiny particles whose collective quantum oscillations play a crucial role. NCTS Center Scientist Dr. Meng-Ru Wu at ASIoP and collaborators (Dr. Zewei Xiong at GSI, Germany, Dr. Manu George at ASIoP, Taiwan, and Dr. Chun-Yu Lin at NCHC, Taiwan) have recently made significant progress in cracking this problem. Through advanced quantum kinetic transport simulations, they discovered that the most relevant quantum oscillations on microscopic scales average out over larger scales, enabling this effect to be accurately modeled using a simple effective classical transport framework. This innovative approach significantly reduces computational challenges, paving the way for astrophysicists to conduct detailed simulations that could revolutionize our understanding of these explosive phenomena. The research has been published on February 7, 2025 in Physical Review Letters.