Spatial entanglement in two-electron atomic systems
نویسندگان
چکیده
Recently, there has been considerable interest in investigating quantum entanglement in two-electron systems, such as two-electron model atoms and quantum dots. In this work, the quantum entanglement of the helium atom and helium-like ions are explored using the two-electron wave functions constructed by the B-spline basis. As a measure of the spatial entanglement, the linear entropy of the reduced density matrix is investigated for the ground state and the singlet excited 1sns1S states, with n = 2–10, of the helium atom. The variation of the spatial entanglement with the nuclear charges Z = 2–15 for the helium-like ions is reported. Results are compared with the existing predictions.
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