Vacuum polarization and plasma oscillations

Abstract

We evidence the existence of plasma oscillations of electrons-positron pairs created by the vacuum polarization in an uniform electric field with E < Ec. Our general treatment, encompassing also the traditional, well studied case of E > Ec, shows the existence in both cases of a maximum Lorentz factor acquired by electrons and positrons and allows determination of the a maximal length of oscillation. We quantitatively estimate how plasma oscillations reduce the rate of pair creation and increase the time scale of the pair production. These results are particularly relevant in view of the experimental progress in approaching the field strengths E < Ec.

to appear in Phys. Lett. A

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• Schwinger effect and backreaction in de Sitter spacetime
• Electron-positron pair oscillation in spatially inhomogeneous electric fields and radiation
• A simple way to take into account back reaction on pair creation
• Pauli blocking effects on pair creation in strong electric field
• Phase space evolution of pairs created in strong electric fields
• On the frequency of oscillations in the pair plasma generated by a strong electric field
• Electromagnetic and gravitational radiation from the coherent oscillation of electron-positron pairs and fields