There seems to be a consensus of Standard Quantum Mechanics StdQM, supported by observation, that the Helium atom He is diamagnetic and so can react to an external magnetic field, even though its $1S^2$ spherically symmetric ground state has zero intrinsic magnetic moment.
To explain the apparent contradiction, the idea of StdQM is to say that an external magnetic field can induce a magnetic moment by somehow changing He from its ground state with zero magnetic susceptibility into a new ground state with non-zero magnetic susceptibility. The physics of this change of ground state is however not well explained.
In RealQM, as a new alternative to StdQM, the ground state of He consists of two half-lobes of electron charge density meeting at a separating plane through the kernel, which forms a non-spherical symmetric charge distribution with separation in the normal direction to the plane as asymmetry, which can generate a non-zero electric dipole moment.
The next question in the optics of RealQM is if the Helium atom with non-zero electric dipole moment can be affected by a magnetic field?
The answer is yes, if the charge distribution with electric dipole moment is rotating, then alignment with an external magnetic field can occur as an expression of diamagnetism.
It is thinkable that the the half-lobes of charge density of He according to RealQM are rotating around an axis parallel to the separating plane and so give an effect of diamagnetism.
It thus seems possible that RealQM can explain the diamagnetism of He in ground state from asymmetric charge distribution with electric dipole.
In StdQM He in ground state has a spherically symmetric charge distribution and the explanation of diamagnetism appears more farfetched.
Check out asymmetry of He in ground state running this code.
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