For example, AI algorithms have gleaned symmetries of nature from the data collected at the Large Hadron Collider in Switzerland. A quantum object is described by a mathematical entity called the quantum state. What is more, two (or more) quantum objects can share a single quantum state. For decades, physicists assumed that entanglement required quantum objects to start out in the same place. He and his colleagues proposed an experiment that began with two unrelated pairs of entangled photons.