A recently published paper (8th August in Phys Review Letters) … speaks of a test for monopoles ...
More details and easier to read:
Freezing magnetic monopoles: How dipoles become monopoles and vice versa ...
Huh ? … Where can such a thing possibly exist (in reality) ? ...Magnetic monopoles, entities with isolated north or south magnetic poles, weren't supposed to exist. If you try to saw a bar magnet in half, all you succeed in getting are two magnets, each with a south and north pole. In recent years, however, the existence of monopoles, at least in the form of "quasiparticles" consisting of collective excitations among many atoms, has been predicted and demonstrated in the lab.
Chuckle, chuckle is all I can say …Normally all magnetic poles should be confined within two-pole couplets---the traditional magnetic dipole. However, at a low enough temperature, around 5 K, "frustration" among the magnetic atoms---they want to align with each other but can't because of the inherent geometry of the material---leads to a disordered state with strong, synchronized fluctuations. Unpaired magnetic poles can form amid this tumult. That is, particles (quasiparticle excitations, to be exact) in spin ice with a net magnetic "charge" can exist and move about. A gas of electric charges is called a "plasma," so some scientists refer to the analogous tenuous cloud of magnetic charges as a "monopole plasma."
… (I don't want to raise the ire of a group of certain passionate 'alternative cosmologists') ..
'Twill be interesting to see how all this pans out .. given that inflation and flatness are a consequence of the production of monopoles in the early universe ..."These kinds of magnetic monopoles are not just mathematical abstractions," said Powell. "They really appear.
Powell's framework for monopoles includes testable predictions about how to observe the transition from monopoles into confined poles.