Entanglement swapping between multi-qudit systems

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Authors	BOUDA Jan BŮŽEK Vladimír
Year of publication	2001
Type	Article in Periodical
Magazine / Source	Journal of Physics A
MU Faculty or unit	Faculty of Informatics
Citation
Web	http://www.iop.org/EJ/S/UNREG/TJsHx2nFMX6wU3BruXWSpQ/abstract/0305-4470/34/20/304
Field	Theoretical physics
Keywords	entanglement; quantum information
Description	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 mj of qudits. Each of the systems is supposed to be prepared in a maximally entangled state of mj qudits, while different systems are not correlated at all. We show that when a set of qj = 1 aj particles (from each of the q systems aj particles are measured) is subjected to a generalized Bell-type measurement, the resulting set of qj = 1 (mj-aj) particles will collapse into a maximally entangled state.
Related projects:	Informatics as the third methodology Non-sequential Models of Computing -- Quantum and Concurrent Distributed Models of Computing