Schrödinger’s cat, a thought experiment envisioned by the Austrian physicist Erwin Schrödinger in 1935, is a paradox that applies the concept of superposition in quantum physics to objects encountered in everyday life. The idea is that a cat is placed in a sealed box with a radioactive source and a poison that will be triggered if an atom of the radioactive substance decays. Quantum physics suggests that the cat is both alive and dead, until someone...
