What’s at the Bottom of Alice’s Rabbit Hole

William W. Hay

Robert Gilmore

G G Davies

Alice thought that she had simply followed the White Rabbit through one of the two slit-like holes, but felt strangely disturbed about whether she had really gone through just one hole, or had somehow passed through both holes simultaneously. The Rabbit, who was eating a turnip, was looking her over. You must be one of those funny-looking things that thinks they know everything, he said. What are you? A lumpy wave or a wavy lump? don't feel like either, said Alice, so I must be something entirely different. The Rabbit snorted. Well, at least you know that, he said. You might even be ready to learn more.

Jean Bricmont

Iulia Georgescu

For the International Year of Quantum Science and Technology, Physics World is shining a spotlight on quantum effects so “weird” they make superposition and entanglement seem almost ordinary. In the second of this series, Iulia Georgescu falls down the rabbit-hole to explore the curiosity that is a quantum Cheshire cat.