An interferometric complementarity experiment in a bulk nuclear magnetic resonance ensemble
- 26 February 2003
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 36 (10), 2555-2563
- https://doi.org/10.1088/0305-4470/36/10/315
Abstract
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 propose a quantitative measure of $D$ by an alternative geometric strategy 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.
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