Best of Last Week—New violations of local realism, a computer that runs on water droplets and nuts warding off diseases
(Phys.org)—It was an interesting week for physics as a combined team of researchers from China and Singapore demonstrated new violations of local realism—they have shown that all mixed entangled states that conform to a particular steering property will violate local realism. Also a team with the Federal University of Minas Gerais in Brazil showed that the Quantum Cheshire Cat effect may be explained by standard quantum mechanics, which questions the possibility of a particle being separated from its properties. And Joseph Fitzsimons and Carlos Pérez-Delgado published a paper describing a blind quantum computing method that surpasses the efficiency 'limit'—overcoming what has been considered to be a natural and universal limit on the efficiency of a particular quantum cryptography task.