A Search on Two-Electron Atoms

Two-electron photoionization of endohedral atoms

Using He@C60 as an example, we demonstrate that static potential of the fullerene core essentially alters the cross section of the two-electron ionization differential in one-electron energy dσ++(ω)/dε. We found that at high photon energy prominent oscillations appear in it due to reflection of the second, slow electron wave on the C60 shell, which ”dies out” at relatively high ε values, of abo...

Regular perturbation theory for two-electron atoms

Article history: Received 23 March 2011 Received in revised form 13 May 2011 Accepted 16 May 2011 Available online 25 May 2011 Communicated by P.R. Holland

Dynamics of Entanglement for Two-Electron Atoms

Abstract We studied the dynamics of the entanglement for two electron atoms as a ”bipartite” quantum system with continuous degrees of freedom. We analyze in particular the time evolution of initial states created from a superposition of the eigenstates of the two-electron Hamiltonian with variable nuclear charge Z. We find that the pairwise entanglement for the two electrons propagate in a way...

Comment on "Molecular description of two-electron atoms"

A program for accurate solutions of two-electron atoms

We present a comprehensible computer program capable of treating non-relativistic ground and excited states for a twoelectron atom having infinite nuclear mass. An iterative approach based on the implicitly restarted Arnoldi method (IRAM) is employed. The Hamiltonian matrix is never explicitly computed. Instead the action of the Hamiltonian operator on discrete pair functions is implemented. Th...