Entanglement is a phenomenon in quantum mechanics where two or more particles become correlated in such a way that the state of one particle is dependent on the state of the other particle, even if the particles are separated by large distances. This correlation exists even if the particles are no longer in contact with each other, and is a consequence of the wave-like nature of particles in quantum mechanics. Entanglement has important applications in quantum information processing, quantum cryptography, and quantum teleportation.\n
What is entanglement in quantum mechanics?