Bound entanglement can be activated

Details Bound entanglement can be activated Bound entanglement can be activated

1998-06-17

arxiv.org/abs/quant-ph/9806058v1

Phys.Rev.Lett. 82 (1999) 1056-1059

Physics

Quantum Physics

RevTeX, 4 pages

Scientific paper

10.1103/PhysRevLett.82.1056

Bound entanglement is the noisy entanglement which cannot be distilled to a singlet form. Thus it cannot be used alone for quantum communication purposes. Here we show that, nevertheless, the bound entanglement can be, in a sense, pumped into single pair of free entangled particles. It allows for teleportation via the pair with the fidelity impossible to achieve without support of bound entanglement. The result also suggests that the distillable entanglement may be not additive.

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