Assisted dynamical Schwinger effect: pair production in a pulsed bifrequent field

Abstract

Electron-positron pair production by the superposition of two laser pulses with different frequencies and amplitudes is analyzed as a particular realization of the assisted dynamic Schwinger effect. It is demonstrated that, within a non-perturbative kinetic equation framework, an amplification effect is conceivable for certain parameters. When both pulses have wavelengths longer than the Compton wavelength, the residual net density of produced pairs is determined by the resultant field strength. The number of pairs starts to grow rapidly if the wavelength of the high-frequency laser component gets close to the Compton wavelength.

9 pages, 5 figures

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• Signatures of the Schwinger mechanism assisted by a fast-oscillating electric field
• Pair production by Schwinger and Breit-Wheeler processes in bi-frequent fields
• Afterglow of the dynamical Schwinger process: soft photons amass
• Kinetic theory of vacuum pair production in uniform electric fields revisited
• Two-color phase-of-the-phase spectroscopy applied to nonperturbative electron-positron pair production in strong oscillating electric fields
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• Light-amplified Landau-Zener conductivity in gapped graphene monolayers: a simulacrum of photo-catalyzed vacuum instability
• Field induced phase transition in the few photon regime