'Spooky' Sightings in Crystal Point to Extremely Rare Quantum Spin Liquid

Little is rarer than an observable quantum spin liquid, but now, tests reveal that a synthetic crystal with ytterbium as its base may house one at near absolute zero. It joins an extremely short list of materials believed house myriads of particles joined together in an observable vast, shared entanglement, or “spooky action at a distance.”

(via WSJ)