文献类型：期刊文献

英文题名：Multiphoton emission of x-rays from cooperative resonant nuclei

作者：Kong, Xiangjin[1,2,3];Chang, Yue[4,5];Zhang, Lida[6];Yuan, Jianmin[7,8];Ma, Yu-Gang[1,2,3]

机构：[1]Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China;[2]NSFC, Res Ctr Theoret Nucl Phys, Shanghai 200438, Peoples R China;[3]Fudan Univ, Shanghai 200438, Peoples R China;[4]Beijing Automat Control Equipment Inst, Beijing 100074, Peoples R China;[5]China Aerosp Sci & Ind Corp, Quantum Technol R&D Ctr, Beijing 100074, Peoples R China;[6]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[7]China Acad Engn Phys, Grad Sch, Dept Phys, Beijing 100193, Peoples R China;[8]Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China

年份：2025

卷号：7

期号：1

外文期刊名：PHYSICAL REVIEW RESEARCH

收录：EI(收录号：20250317677823);WOS:【ESCI(收录号:WOS:001460843900003)】；

基金：We would like to thank Tao Shi, Juntian Shan, and Xiaolei Zan for helpful discussions. We also appreciate the suggestions from the anonymous referees, who encouraged us to explore new effects beyond the weak-excitation ap-proximation. The ITensor Library [67] was used during the simulations. This work is supported by the National Key Research and Development Program of China under Contract No. 2024YFA1610900 and the National Natural Science Foundation of China (NSFC) under Contracts No. 12447106, No. 12147101, No. 12274384, and No. 11904404.

语种：英文

外文关键词：Atoms - Laser excitation - Multiphoton processes - X ray lasers

摘要：The advent of x-ray free electron lasers (XFELs) has opened the door to exploring the x-ray-nuclei interaction in the multiexcitation regime. Here, we show the dependence of emission properties of x-ray photons from an ensemble of identical resonant nuclei on the number of excitations in the system, employing the theoretical methods we have introduced. Under the multiexcitation condition, the detection of x-ray quanta is emission-order selective. Our work presents an efficient approach to investigating the multiphoton emission of x-rays from cooperative resonant nuclei within and beyond weak-excitation regimes, offering valuable insights into nonlinear x-ray optics and many-body nuclear physics.