在波包和拍波中推动和拉动物理力
Pushing and Pulling Ponderomotive Forces in Wavepackets and Beat Waves
AI总结：
研究波包和拍波中粒子受迫动力的影响，分析不同粒子类型在正反向传播波包中的运动特性，探讨拍波实现拉力机制的物理原理。
摘要：
我们考虑在传播波包（脉冲）中作用于小粒子的迫动力。具体分析简单点粒子以及复合偶极子和哑铃状粒子在正向传播（平行相位和群速）和反向传播（反平行相位和群速）波包中的行为。根据波包特性，粒子可能被推离波源或拉向波源。我们还研究了由两个频率略有不同的正向传播波生成的拍波中粒子的动力学。此类拍波可以模拟周期性正反向传播脉冲序列。特别是，这提供了一种简单机制，用于实现光学和声学‘牵引束’中使用的拉力。
英文摘要：
We consider ponderomotive forces acting on small particles in propagating wave packets (pulses). Specifically, we analyze simple point particles as well as composite dipole and dumbbell particles in the fields of forward-propagating (parallel phase and group velocities) and backward-propagating (antiparallel phase and group velocities) wave packets. Depending on the characteristics of the wave packet, particles may be pushed away from the wave source or pulled toward it. We also examine particle dynamics in the field of a beat wave generated by two forward-propagating waves with slightly different frequencies. Such a beat wave can emulate a periodic sequence of either forward- or backward-propagating pulses. In particular, this provides a simple mechanism for realizing pulling forces as employed in optical and acoustic `tractor beams'.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
