Experimental generation of pseudo-bound-entanglement

Experimentelle Physik IIIa, Technische Universit¨at Dortmund, D-44221 Dortmund, Germany(Dated: September 15, 2009)We use Nuclear Magnetic Resonance (NMR) to experimentally generate a bound entangled (moreprecisely: pseudo bound entangled) state, i.e. a quantum state which is non-distillable but neverthe-less entangled. Our quantum system consists of three qubits. We characterize the produced statevia state tomography to show that the created state has a positive partial transposition with respectto any bipartite splitting, and we use a witness operator to prove its entanglement.