Assisted dynamical Schwinger effect: pair production in a pulsed bifrequent field
1 Department of Physics, Saratov State
2 Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
3 Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
4 Institute for Theoretical Physics, University of Wroclaw, 50-204 Wroclaw, Poland
5 Bogoliubov Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
6 National Research Nuclear University (MEPhI), 115409 Moscow, Russia
a e-mail: firstname.lastname@example.org
Received in final form: 2 January 2016
Published online: 15 March 2016
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.
Key words: Ultraintense and Ultra-short Laser Fields
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