AI 中文总结
针对脉冲星磁层放电与射电辐射的建模难题，提出解析并发模型与PIC模拟，验证了极限环行为等预测，为关联微观间隙动力学与宏观观测提供了理论框架。
AI 中文摘要
射电脉冲星可通过磁层间隙中的间歇性等离子体放电产生相干射电辐射，但粒子加速、量子电动力学（QED）过程与电场屏蔽之间的非线性耦合仍难以自洽建模。我们提出了极冠放电的解析并发模型与第一性原理粒子模拟（PIC），该模型预测了极限环行为：电场与等离子体密度以由局域等离子体频率决定、受等离子体惯性修正的频率振荡。采用精确QED率与真实等离子体参数的一维模拟验证了这些预测，放电产生的对多重度可达$M_\pm \sim 10^4$，并激发与脉冲星射电微结构一致的电场振荡谱。这些结果为连接微观间隙动力学与宏观可观测量提供了理论框架。
英文摘要
Radio pulsars can power their coherent radio emission through intermittent plasma discharges in magnetospheric gaps. The nonlinear coupling between particle acceleration, quantum electrodynamic (QED) processes, and electric field screening remains difficult to model self-consistently. We present an analytical concurrency model and first-principles particle-in-cell (PIC) simulations of polar cap discharges. The model predicts limit-cycle behavior where the electric field and plasma density oscillate with a frequency set by the local plasma frequency, modified by the plasma inertia. One-dimensional simulations with exact QED rates and realistic plasma parameters validate these predictions. The discharges generate pair multiplicities up to $M_\pm \sim 10^4$ and excite electric field oscillations with spectra consistent with pulsar radio microstructure. These results provide a theoretical framework connecting microphysical gap dynamics to macroscopic observables.
Comments18 pages, 8 figures. Comments welcome!
