An open problem of many-body physics, related to isolated quantum systems, is reviewed for a Bose-Einstein condensate.

An open problem of many-body physics, related to isolated quantum systems, is reviewed for a Bose-Einstein condensate.
Findings and resulting theory could reveal mechanism behind zero-energy-loss current-carrying capability.
Scientists from Berkeley and TU Munich investigate magnons in a material that becomes helimagnetic below about 30 kelvin: iron silicide doped with cobalt.