Аннотация
Quantum calculations of a (1+1)-dimensional model for double ionization
in strong laser fields are used to trace the time evolution from
the ground state through ionization and rescattering to the two-electron
escape. The subspace of symmetric escape, a prime characteristic
of nonsequential double ionization, remains accessible by a judicious
choice of 1D coordinates for the electrons. The time-resolved ionization
fluxes show the onset of single and double ionization, the sequence
of events during the pulse, and the influences of pulse duration
and reveal the relative importance of sequential and nonsequential
double ionization, even when ionization takes place during the same
field cycle.
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