Ultrafast electron-impact-excited N2 superfluorescence in femtosecond filamentsRemoveCheming Chen (陈车明), Chuan Cheng (郑铨), Zoumingyang Zhu (朱邹明阳), Zetao Liu (刘泽涛), Jinping Yao (姚金平), Aurélien Houard, André Mysyrowicz, Yi Liu (刘一), Wen-Te Liao (廖文德), and Pengji Ding (丁鹏基)Phys. Rev. A 114, 043534 (2026)