Error-prone quantum bits could correct themselves, physicists show  December 9, 2020 One of the chief obstacles facing quantum computer designers is correcting the errors that creep into a processor’s calculations. A team of researchers in the US (NIST, University of Maryland, Caltech) is experimenting with a photonic cavity resonator into which multiple photons can be driven to bounce back and forth between the cavity’s reflective walls. The photons combine to form ripple-like interference patterns. The patterns themselves contain the qubit’s information. Rather than construct an elaborate system to detect, measure and compensate for noise and errors, the team members perceived that if the supply of photons in […]