Brodin G, Marklund M, Eliasson B, Shukla P K
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden.
Phys Rev Lett. 2007 Mar 23;98(12):125001. doi: 10.1103/PhysRevLett.98.125001. Epub 2007 Mar 20.
We present for the first time the nonlinear dynamics of quantum electrodynamic (QED) photon splitting in a strongly magnetized electron-positron (pair) plasma. By using a QED corrected Maxwell equation, we derive a set of equations that exhibit nonlinear couplings between electromagnetic (EM) waves due to nonlinear plasma currents and QED polarization and magnetization effects. Numerical analyses of our coupled nonlinear EM wave equations reveal the possibility of a more efficient decay channel, as well as new features of energy exchange among the three EM modes that are nonlinearly interacting in magnetized pair plasmas. Possible applications of our investigation to astrophysical settings, such as magnetars, are pointed out.
我们首次展示了强磁化电子 - 正电子（对）等离子体中量子电动力学（QED）光子分裂的非线性动力学。通过使用经QED修正的麦克斯韦方程，我们推导出了一组方程，这些方程展示了由于非线性等离子体电流以及QED极化和磁化效应导致的电磁波之间的非线性耦合。对我们耦合的非线性电磁波方程的数值分析揭示了一种更高效衰变通道的可能性，以及在磁化对等离子体中非线性相互作用的三种电磁波模式之间能量交换的新特征。我们指出了该研究在天体物理环境（如磁星）中的可能应用。
