They're saying that the probability of the fundamental particle characteristics (% chance of a electron or other particule having a particle spin/location), is physical and has a measurable weight. This probability chart is 'an information bit'.

The team has proposed an experiment that involves shooting an electron beam (at CERN) into positrons. They have proposed an expected outcome and if they are correct it would be very significant proof of theory. That information does have weight and needs to be accounted for.