Bound Entanglement Can Be Activated
Paweł Horodecki, Michał Horodecki, Ryszard Horodecki · Physical Review Letters · 1999
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 a single pair of free entangled particles. It allows for teleportation via the pair with the fidelity impossible to achieve without support of bound entanglement.