The properties of the forced oscillations of virtual electron-positron plasma generated in vacuum under the action of a short laser pulse are considered. By calculating the density of the conduction and polarization currents within the quantum kinetic approach, we demonstrate the presence of plasma oscillations at the frequency of the external field and its odd harmonics. It is expected that radiation generated by these plasma oscillations can be observed outside the interaction region, for example, outside the focal spot of two counterpropagating laser beams, and can serve as an indicator of the Schwinger mechanism of electron-positron creation from vacuum.

中文翻译：

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Schwinger效应伴随的辐射信号

考虑了在短激光脉冲的作用下在真空中产生的虚拟电子-正电子等离子体的强制振荡的性质。通过在量子动力学方法内计算传导和极化电流的密度，我们证明了在外场频率及其奇次谐波处存在等离子体振荡。期望可以在相互作用区域之外，例如在两个反向传播的激光束的焦点之外，观察到由这些等离子体振荡产生的辐射，并且可以用作由真空产生电子正电子的史维杰机理的指示。