Laser-induced electron diffraction in H2 with linear and circular polarization ultrashort XUV laser pulses

摘要

Numerical solution of the time-dependent Schrodinger equation for a two-dimension model of H_2 ionization by intense ultrashort (few cycles) extreme ultraviolet (XUV) laser pulses are presented to compare linear and circular polarization angular distributions for aligned molecules. Both ground (X Σ_g~+) and excited (A ~3Σ_u~+) states ionization is calculated at equilibrium and for extended large internuclear distance configurations to study the effect of electron delocalization via molecular orbitals vs electron localization in Heitler-London atomic wave functions. It is found that at large distance for ionized electron wavelengths less than the inter-nuclear distance, circular polarization ionization angular distributions exhibit signature of the entanglement of electrons by exchange, thus, allowing for a measure of exchange entanglement.