Electron-positron pair creation in the superposition of two oscillating electric field pulses with largely different frequency, duration and relative positioning

Abstract

Production of electron-positron pairs in two oscillating strong electric field pulses with largely different frequencies and durations is considered. In a first scenario, the influence of a low-frequency background field on pair production by a short main pulse of high frequency is analyzed. The background field is shown to cause characteristic modifications of the momentum spectra of created particles which, in turn, may be used for imaging of the background pulse. In a second scenario, an ultrashort, relatively weak assisting pulse is superimposed onto a strong main pulse. By studying the dependence of the pair production on the field parameters it is shown that duration and relative position of the ultrashort pulse modify the momentum spectra of produced particles in a distinctive way. Both scenarios enable, moreover, to extract partial information about the time periods when pairs with certain momenta are produced predominantly.

10 pages, 9 figures

References in corpus (13)

• Dynamically assisted Schwinger mechanism
• Momentum signatures for Schwinger pair production in short laser pulses with a sub-cycle structure
• Schwinger pair production in space- and time-dependent electric fields: Relating the Wigner formalism to quantum kinetic theory
• Pair production in laser fields oscillating in space and time
• Electron-positron pair production in a bifrequent oscillating electric field
• Lifting shell structures in the dynamically assisted Schwinger effect in periodic fields
• Optimization of Schwinger pair production in colliding laser pulses
• Dynamical Schwinger process in a bifrequent electric field of finite duration: survey on amplification
• Spin polarized electron-positron pair production via elliptical polarized laser fields
• Momentum vortices on pairs production by two counter-rotating fields
• Momentum distribution of particles created in space-time-dependent colliding laser pulses
• Pulse shape effects on the electron-positron pair production in strong laser fields
• Electron-positron pair production in oscillating electric fields with double-pulse structure