How Tiny Schrödinger’s Cats Could Upend Quantum Again

The building blocks of quantum computers are often thought to imitate the famous thought experiment known as Schrödinger’s cat, in which quantum physics essentially suspends a cat in a box in a nebulous state between life and death: The cat only definitely becomes alive or dead when someone looks in the box. Now, by mimicking Schrödinger’s cats as closely as possible, a French startup reveals it could help make extraordinarily powerful quantum computers a reality sooner than previously thought—a strategy Amazon is also pursuing.