Experimental generation of pseudo-bound-entanglement
Hermann Kampermann, Dagmar Bruß, Xinhua Peng, Dieter Suter · Physical Review A · 2010
We use nuclear magnetic resonance to experimentally generate a bound-entangled (more precisely: pseudo-bound-entangled) state, i.e., a quantum state which is nondistillable but nevertheless entangled. Our quantum system consists of three qubits. We characterize the produced state via state tomography to show that the created state has a positive partial transposition with respect to any bipartite splitting, and we use a witness operator to prove its pseudoentanglement.