An interferometric complementarity experiment in a bulk Nuclear Magnetic Resonance ensemble

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.

13 page, 5 PS figures

References in corpus (2)

• Preparation of pseudo-pure states by line-selective pulses in Nuclear Magnetic Resonance
• An NMR Analog of the Quantum Disentanglement Eraser

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• Quantitative complementarity between local and nonlocal character of quantum states in a three-qubit system
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• Robustness of interferometric complementarity under Decoherence
• Complementary Relationships between Entanglement and Measurement