Physicists have created the largest experimental version of Schrödinger’s cat – or the quantum superposition of two states – to date, and they believe the set-up could be used to test the limits of quantum mechanics.
The famous thought experiment, proposed by Erwin Schrödinger in 1935, consists of a cat inside a box with a radioactive substance and a flask of poison. The radiation and poison could both kill the cat but we can’t see inside. As a result, the cat is considered both dead and alive until the box is opened and its state can be seen.
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Abigail Beall 