Relativistic quantum similarities in atoms in position and momentum spaces

Abstract A study of different quantum similarity measures and their corresponding quantum similarity indices is carried out for the atoms from H to Lr ( Z = 1 – 103 ). Relativistic effects in both position and momentum spaces have been studied by comparing the relativistic values to the non-relativistic ones. We have used the atomic electron density in both position and momentum spaces obtained within relativistic and non-relativistic numerical-parameterized optimized effective potential approximations.