Experimental Test of Complementarity by Nuclear Magnetic Resonance Techniques

We have tested complementarity for the ensemble-averaged spin states of nuclei C in the molecule of 13CHCl3 by the use of the spin states of another nuclei H 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 waveand particle-like behavior is simultaneously observed with the help of measuring populations and coherences 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 analyzed. PACS number(s): 42.50 Vk, 32.80.Pj Typeset using REVTEX Author to whom correspondence should be addressed. Email address: [email protected]