Path-phase duality of an interfering particle with translational-internal entanglement

Abstract

The aim of this paper is to revisit the implications of complementarity when we inject into a Mach Zehnder interferometer particles with internal structure, prepared in special translational-internal entangled (TIE) states. This correlation causes the path distinguishability to be phase dependent in contrast to the standard case. We show that such a TIE state permits us to detect small phase shifts along with almost perfect path distinguishability, beyond the constraints imposed by complementarity on simultaneous which-way and which-phase measurements for standard cases (when distinguishability is independent of interferometric phase).

14 pages, 5 figures

References in corpus (3)

• A Delayed Choice Quantum Eraser
• The Faraday Quantum Clock and Non-local Photon Pair Correlations
• Signatures of Strong Momentum Localization via Translational-Internal Entanglement

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