Abstract
Using a configuration-interaction variational method, we accurately compute the reduced, single-electron von Neumann and linear entropy for several low-energy, singlet and triplet eigenstates of helium atom. We estimate the amount of electron-electron orbital entanglement for such eigenstates and show that it decays with energy.
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Benenti, G., Siccardi, S. & Strini, G. Entanglement in helium. Eur. Phys. J. D 67, 83 (2013). https://doi.org/10.1140/epjd/e2013-40080-y
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DOI: https://doi.org/10.1140/epjd/e2013-40080-y