An example of the strangeness in the quantum realm—one that has no equivalent in the world as we experience it—is the phenomenon of quantum entanglement. In our classical world, if Iman flips a coin ...

In the normal state, each coin can be independently in heads or tails position when tossed randomly, but in the entangled GHZ state, all four photons are connected in a special way: when observed ...

However, if the coins continue to spin for a longer duration, they will eventually lose synchronicity and no longer end up with the same side—heads or tails—facing up.