论文标题
强磁对等离子体中的非线性光学元件，应用于FRB
Nonlinear optics in strongly magnetized pair plasma, with applications to FRBs
论文作者
论文摘要
强烈的辐射场可以改变血浆特性，相应的折射率，并导致非线性传播效应，例如自我关注。我们估算了对血浆中的相应效应，无论是在未磁性和磁性磁性的情况下都具有磁性效果。首先，在不磁化的血浆中，蓬源力不会导致电荷分离，而是导致密度耗尽。其次，对于脉冲星磁层的天体物理相关等离子体（以及快速无线电突发的可能位点），其中回旋频率$ω_b$在等离子体频率$ω_p$和电磁波的频率上占主导 海浪; （ii）Ponderomotive Force是$ f_p^{（b）} = - {m_e c^2}/（{4 b_0^2}）\ nabla e^2 $;如果与未磁化的情况相比，它会减少一个因子$（ω/ω_b）^2 $（$ b_0 $是外部磁场，而$ e $是波浪的电场）； （iii）对于沿恒定磁场沿恒定等离子体的恒定磁场传播的辐射束与密度$ n_ \ pm $，浮动力导致圆形电流的出现，从而导致光束内的磁场降低$ΔB/b_0 =2πn_\2πn_\ pm m_e c^2 {e^2 {e^2} e^2}/{b_0^4}讨论了对FRB物理的应用；我们得出的结论是，对于FRB的参数，主要的磁场完全抑制了非线性辐射效应。
Intense radiation field can modify plasma properties, the corresponding refractive index, and lead to such nonlinear propagation effects as self-focusing. We estimate the corresponding effects in pair plasma, both in unmagnetized and strongly magnetically dominated case. First, in the unmagnetized pair plasma the ponderomotive force does not lead to charge separation, but to density depletion. Second, for astrophysically relevant plasmas of pulsar magnetospheres, (and possible loci of Fast Radio Bursts), where cyclotron frequency $ω_B$ dominates over plasma frequency $ω_p$ and the frequency of the electromagnetic wave, $ω_B \gg ω_p,\, ω$, we show that (i) there is virtually no nonlinearity due to changing effective mass in the field of the wave; (ii) ponderomotive force is $F_p^{(B)} =- {m_e c^2}/({4 B_0^2}) \nabla E^2$; it is reduced by a factor $(ω/ω_B)^2$ if compared to the unmagnetized case ($B_0$ is the external magnetic field and $E$ is the electric field of the wave); (iii) for radiation beam propagating along constant magnetic field in pair plasma with density $n_\pm$, the ponderomotive force leads to appearance of circular currents that lead to the decrease of the field within the beam by a factor $ΔB/B_0 = 2πn_\pm m_e c^2 {E^2}/{B_0^4}$. Applications to the physics of FRBs are discussed; we conclude that for parameters of FRB's the dominant magnetic field completely suppresses nonlinear radiation effects.
