Resumen de Quantum effects get a weirdness scale
Physicists are continually testing quantum effects at increasing scales, to probe the divide between the classical and quantum realms. But without a ranking system it wasn't clear how far they had got. Klaus Hornberger of the University of Duisburg-Essefl in Germany and his colleague Stefan Nimmrichter have come up with such a system. If a quantum-classical divide exists, quantum laws will have to change. But successful quantum experiments at larger and larger scales rule out some of the possible modifications. The more changes an experiment rules out, the higher it scores. This makes it possible to compare theoretical and real experiments and creates a list of chart-toppers. Attempts at neutron superposition in the 1960s score around 5 or 6, while modern experiments involving nearly 500 atoms hit 12. It is a logarithmic scale, so this is roughly a million-fold improvement but it pales next to Schrodinger's cat. Implementing this thought experiment with existing quantum technology would max out at 24. Aversion in which an actual cat simultaneously sits in two spots that are 10 centimeters apart, would score 57.
