Quantum Teleportation and Entanglement Swapping for Spin Systems

Details Quantum Teleportation and Entanglement Swapping for Spin Systems Quantum Teleportation and Entanglement Swapping for Spin Systems

2001-11-14

arxiv.org/abs/quant-ph/0111079v3

New J. Phys. 4, 8 (2002)

Physics

Quantum Physics

16 pages, 9 figures, modified to be consistent with published version

Scientific paper

10.1088/1367-2630/4/1/308

We analyse quantum teleportation (QT) and entanglement swapping (ES) for spin systems. If the permitted operations are restricted to the Ising interaction, plus local rotations and spin measurements, high-fidelity teleportation is achievable for quantum states that are close to the maximally weighted spin state. ES is achieved, and is maximized for a combination of entangled states and Bell measurements that is different from the QT case. If more general local unitary transformations are considered, then it is possible to achieve perfect teleportation and ES.

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