Vacuum decay and the transmission resonances in space-dependent electric fields

Understand

We investigate the decay of quantum electrodynamical (QED) vacuum in arbitrary space-dependent electric fields.

• In particular, we analyze the resonance peaks of the positron emission spectrum for the external fields with subcycle structure.
• For this, we study the transmission probability in the framework of scattering approach to vacuum pair production.
• In under-the-barrier scattering regime, we show that the width of a transmission resonance can be enhanced when the effective scattering potential contains multiple wells.