Increasing singlet fraction with entanglement swapping
arXiv:0805.1044 · doi:10.1103/PhysRevA.78.032321
Abstract
We consider entanglement swapping for certain mixed states. We assume that the initial states have the same singlet fraction and show that the final state can have singlet fraction greater than the initial states. We also consider two quantum teleportations and show that entanglement swapping can increase teleportation fidelity. Finally, we show how this effect can be demonstrated with linear optics.
5 pages, 4 figures
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- Parametric separation of symmetric pure quantum states
- Repeater-Based Quantum Communication Protocol: Maximizing Teleportation Fidelity with Minimal Entanglement
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