2003 An interferometric complementarity experiment in a bulk nuclear magnetic resonance ensemble
Xinhua Peng, Xiwen Zhu, Ximing Fang, Mang Feng, Maili Liu, Kelin Gao · 2002
We have experimentally demonstrated the interferometric complementarity, which relates the distinguishability D quantifying the amount of which-way (WW) information to the fringe visibility V characterizing the wave feature of a quantum entity, in a bulk ensemble by Nuclear Magnetic Resonance (NMR) techniques. We primarily concern on the intermediate cases: partial fringe visibility and incomplete WW information. We define D by an alternative formalism and investigate the relation between D and entanglement. By measuring D and V independently, it turns out that the duality relation D 2 + V 2 = 1 holds for pure quantum states of the markers.