Quantum clones attack cat paradox

摘要

From the photocopier to the fax to a computer's "copy and paste" function, the ability to replicate information is something we take for granted. At the quantum scale, however, making exact copies should be impossible. Now there's a way to dodge this cloning ban that could also help map the border between the "classical", everyday world and the quantum realm - a goal illustrated by the Schrodinger's cat paradox.