论文标题
极端场的特殊统一粒子推动器
Special unitary particle pusher for extreme fields
论文作者
论文摘要
先前给出了对粒子代码有用的精确动量更新。涉及的表达很笨拙。通过将动量视为SU（2）XSU（2）而不是SO（3,1）的表示，可以获得更紧凑的表达式，以获得精确动量更新。可以制定时间步的力量扩展，以便保留不变属性，并获得与标准Boris推动器相当的推动率。
An exact momentum update useful for particle codes was previously given. The expressions involved were unwieldy. By treating the momentum as a representation of SU(2)xSU(2) instead of SO(3,1), a more compact expression for the exact momentum update is obtained. An expansion in powers of the timestep can be formulated such that invariance properties are exactly preserved, and push rates comparable to the standard Boris pusher are obtained.
