Entanglement swapping between multi-qudit systems
Jan Bouda, Vladimír Bužek · Journal of Physics A Mathematical and General · 2001
We generalize the entanglement swapping scheme originally proposed for two pairs of qubits to an arbitrary number q of systems composed from an arbitrary number m j of qudits. Each of the systems is supposed to be prepared in a maximally entangled state of m j qudits, while different systems are not correlated at all. We show that when a set of ∑ q j = 1 a j particles (from each of the q systems a j particles are measured) is subjected to a generalized Bell-type measurement, the resulting set of ∑ q j = 1 ( m j - a j ) particles will collapse into a maximally entangled state.