Quantum entanglement is really rather interesting. Unfortunately, it’s also really rather hard to understand. It allows us to transfer information “instantaneously” across vast distances. Hypothetically, we could use quantum entanglement in communication and other technological applications, like making a battery that never dies.
Einstein put it best when he described this peculiar property of quantum mechanics as “spooky action at a distance.” Here, two or more particles are entangled which means they share the same wave form. The more technical definition is:
“Quantum entanglement occurs when particles such as photons, electrons, molecules as large as buckyballs, and even small diamonds interact physically and then become separated; the type of interaction is such that each resulting member of a pair is properly described by the same quantum mechanical description (state), which is indefinite in terms of important factors such as position, momentum, spin, polarization, etc.”