*http://www.nature.com/nphys/journal/v8/n10/full/nphys2406.html <http://www.nature.com/nphys/journal/v8/n10/full/nphys2406.html>*
*Half-solitons in a polariton quantum fluid behave like magnetic monopoles* *This is old ground but recapitulation never hurts.* *This states that polaritons formed by nanowires or cracks (defect potential in a semiconductor microcavity) can form a Bose Einstein condensate of spinners (solitons). This also says that the polariton spinner of magnetic monopole can for a anti spinner. This means that this magnetic monopole can extract mass from the Higgs field. That is, IMHO, a condensate of polariton spinners could be dark matter.* *<Snip>* *Magnetic monopoles are point-like sources of magnetic field, never observed as fundamental particles. This has triggered the search for monopole analogues in the form of emergent particles in the solid state, with recent observations in spin-ice crystals and one-dimensional ferromagnetic nanowires. Alternatively, topological excitations of spinor Bose–Einstein condensates have been predicted to demonstrate monopole textures. Here we show the formation of monopole analogues in an exciton–polariton spinor condensate hitting a defect potential in a semiconductor microcavity. Oblique dark solitons are nucleated in the wake of the defect in the presence of an effective magnetic field acting on the polariton pseudo-spin. The field splits the integer soliton into a pair of oblique half-solitons of opposite magnetic charge, subject to opposite effective magnetic forces. These mixed spin-phase excitations thus behave like one-dimensional monopoles. Our results open the way to the generation of stable magnetic currents in photonic quantum fluids.* *<EndSnip>*
