Trapping of Quantized Electrical Charge in Superfluid 3He-B via the   Electrodynamics of Spin-orbit Coupled Systems
  Exploiting analogies between spin-orbit coupled spin superfluids and non-Abelian Yang-Mills theory, we argue that machines can be built capable of trapping a quantized amount of electric linear charge density, while the line charge quantum itself is surprisingly large. The required conditions might well hold in superfluid 3He-B, for which we propose an experimental realization of this phenomenon. 
Zaira Nazario, Bart Leurs, David I. Santiago, and Jan Zaanen