Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement

Details Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement

2009-09-02

arxiv.org/abs/0909.0425v3

Euro. Phys. Lett. 89, 10005(2010).

Physics

Quantum Physics

5 pages, 1 Figure

Scientific paper

Based on a scheme that produces an entanglement between the spin and the path variables of a single spin-1/2 particle (qubit) using a beam-splitter and a spin-flipper, we formulate a procedure for transferring this intraparticle hybrid entanglement to an interparticle entanglement between the spin variables of two other spatially separated spin-1/2 particles which never interact with each other during the entire process. This procedure of entanglement swapping is accomplished by a Mach-Zehnder setup in conjunction with the Stern-Gerlach measuring device, using suitable unitary operations. The proposed protocol, thus, enables the use of intraparticle entanglement as a resource - a feature that has remained unexplored.

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