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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Quantum teleportation and entanglement swapping for spin systems

Dominic W Berry1 and Barry C Sanders1,2

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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.


PACS

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

42.50.Dv Quantum state engineering and measurements

Subjects

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 1 (February 2002)

Received 20 November 2001

Published 28 February 2002



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