(Phys.org)—Many quantum technologies rely on quantum states that violate local realism,which means that they either violate locality (such as when entangled particles influence each other from far away) or realism (the assumption that quantum states occupy well-defined properties, independent of measurement), and possibly both. Violation of local realism is one of the many counterintuitive,yet experimentally supported, characteristics of the quantum world.
Source: phys.org