Refer to the experiment below: Trying to understand this phrase/sentence: "Entanglement after the photons no longer exist" What is being entangled if the photons no longer exist? Victor can entangled the two photons but Alice and Bob's photons are destroyed, so how can they be entangled? The experiment is as below.. The basic setup goes like this: Both pairs of photons are entangled, so that the two particles in the first set are entangled with each other, and the two particles in the second set are entangled with each other. Then, one photon from each pair is sent to a person named Victor. Of the two particles that are left behind, one goes to Bob, and the other goes to Alice. But now, Victor has control over Alice and Bob's particles. If he decides to entangle the two photons he has, then Alice and Bob's photons, each entangled with one of Victor's, also become entangled with each other. And Victor can choose to take this action at any time, even after Bob and Alice may have measured, changed or destroyed their photons.