Entanglement and coherence in photoionization of H2 by an ultrashort XUV laser pulse

We make a theoretical investigation of photoionization of an {\mathrm{H}}_{2}molecule, induced by the irradiation of an ultrashort extreme ultraviolet (XUV) laser pulse. We consider a system composed of a photoelectron ejected from {\mathrm{H}}_{2}and the resultant {{\mathrm{H}}_{2}}^{+}as a bipartite system. In order to clarify how the interparticle correlations among two electrons and two protons in {\mathrm{H}}_{2}are reflected to...