Entanglement is a crazy phenomenon. Apparently, it allows particles to communicate over vast distances, faster than the speed of light.

Though there is connectivity between entangled parties, these do not necessarily share information between them.

In quantum mechanics, a particle is not really a particle but a cloud of fuzzy probabilities. These probabilities describe where this particle could have been placed, when we look for it.

These fuzzy probabilities are in fact quantum states. If the certain circumstances occur, we can connect two parties in a quantum way. Therefore, a single equation describes both sets of probabilities at one and the same time. This by itself is called entanglement.

Quantum state particles show similar properties. We know electrons, the sub-atomic particles, revolve around the nucleus of the atom. Let us look at their quantum spin. The spin could be in one of the two states — either up or down. If these two electrons are entangled, their spins show correlation. The entanglement can be planned in a certain way, so that the spins are always opposites of each other.

Examine one particle randomly. There is random spin that points upwards. Can we predict about the second particle? The quantum state has been carefully arranged. Therefore, we are sure that the second particle must be pointing downwards. The quantum state was entangled with the first particle, as soon as one declaration is made. That means both the declarations are made.

What happens if the second particle is at a distance? In quantum theory, as soon as one particle is chosen, the partner particle instantly knows what spin to be in. Apparently, it is communication faster than light.

If two different persons take measurements for particles, the person measuring particle A knows the spin of particle A. Or else the other person tells you about the measurement. In both the cases, there is no transmission. Either you measure or wait for the other person’s signal.

In case of two connected particles, there is no advance knowledge of anything. The person knows how the particle is behaving but I communicate it slower than the speed of light.

Thus, entanglement process, though instantaneous, the revelation of it is not instantaneous. The older communication method prevails to piece together the correlation of the quantum entanglement.