We have tested complementarity for the ensemble-averaged spin states of nuclei 13C in the molecule of 13CHCl3 by the use of the spin states of another nuclei 1H as the path marker. It turns out that the wave-particle duality holds when one merely measures the probability density of quantum states, and that the wave- and particle-like behavior is simultaneously observed with the help of measuring populations and coherence in a single nuclear magnetic resonance(NMR) experiment. Effects of path-marking schemes and causes of the appearance and disappearance of the wave behavior are analysed.
@article{arxiv.quant-ph/0011094,
title = {Experimental Test of Complementarity by Nuclear Magnetic Resonance Techniques},
author = {Xiwen Zhu and Ximing Fang and Xinhua Peng and Mang Feng and Kelin Gao and Fei Du},
journal= {arXiv preprint arXiv:quant-ph/0011094},
year = {2007}
}