In starting from the conventional interpretation of quantum mechanics, physicists had not realized such measurements were possible. (discovermagazine.com)
The laws of quantum mechanics allow pairs of electrons to «tunnel» through the barrier only very occasionally — helping the team to isolate and control the pairs as they slowly break out. (scientificamerican.com)
They then used the weird rules of quantum mechanics to simultaneously set the paddle moving while leaving it standing still. (scientificamerican.com)