Entanglement swapping between multi-qudit systems

Details Entanglement swapping between multi-qudit systems Entanglement swapping between multi-qudit systems

2001-12-04

arxiv.org/abs/quant-ph/0112022v2

J PHYS A-MATH GEN 34: (20) 4301-4311 MAY 25 2001

Physics

Quantum Physics

7 revtex pages, 4 figures

Scientific paper

10.1088/0305-4470/34/20/304

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 system 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 $\sum_{j=1}^q a_j$ particles (from each of the $q$ systems $a_j$ particles are measured) are subjected to a generalized Bell-type measurement, the resulting set of $\sum_{j=1}^q (m_j-a_j)$ particles will collapse into a maximally entangled state.

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