Electron stripping and re-attachment at atomic centers using attosecond half-cycle pulses

TL;DR

This paper explores how attosecond half-cycle pulses can manipulate electron re-attachment and ionization in Coulomb systems like hydrogen ions and helium atoms, revealing control mechanisms at ultrafast timescales.

Contribution

It introduces a method to control electron re-attachment and double ionization using sequences of attosecond HCPs, advancing ultrafast atomic manipulation techniques.

Findings

Controlled electron re-attachment to atomic centers achieved.

Sequence of HCPs influences ionization probabilities.

Demonstrated potential for ultrafast atomic control.

Abstract

We investigate the response of two three-body Coulomb systems when driven by attosecond half-cycle pulses: The hydrogen molecular ion and the helium atom. Using very short half-cycle pulses (HCPs) which effectively deliver ``kicks'' to the electrons, we first study how a carefully chosen sequence of HCPs can be used to control to which of one of the two fixed atomic centers the electron gets re-attached. Moving from one electron in two atomic centers to two electrons in one atomic center we then study the double ionization from the ground state of He by a sequence of attosecond time-scale HCPs, with each electron receiving effectively a ``kick'' from each HCP. We investigate how the net electric field of the sequence of HCPs affects the total and differential ionization probabilities.