http://arxiv.org/pdf/1309.1288v1.pdf
Nuclear magnetization in gallium arsenide quantum dots at zero magnetic fields Another example as follows: http://physics.aps.org/articles/v7/17 Long-lived singlet states--zero-spin states made of two spin- particles--can be created by combining two different atomic species such as carbon and hydrogen. The production of a proton pair with zero spin can be done by applying a Zero magnetic field known as a knight field. A very large Knight Field is the effective field experienced by the nuclei in the presence of a spin polarized electron. If the magnetic field does not vary, this constant field will lineup the spin and anti-spin of the particles along a constant and unchanging magnetic field line direction. This looks like an anapole field produced by the soliton (aka NAE) to me. This knight field spin locks the two particles together. The pair will remain together for a long time after they are locked together.
