Quantum coherence versus interferometric visibility in a biased Mach-Zehnder interferometer

Abstract

The double-slit interferometer and the Mach-Zehnder interferometer (MZI) with balanced beam splitters are prototypical setups for investigating the quantum wave-particle duality. These setups induced a quantitative association of interferometric visibility (IVI) with the wave aspect of a single quantum system (WAQ). Recently, it was realized that quantum coherence (QC) can be better suited than IVI for quantifying the WAQ in complementarity relations. In this article, we investigate a MZI with biased beam splitters both in the input and the output, and we show that in some cases the IVI is not adequate to quantify the WAQ since it does not reflect the behavior of the quantum coherence, even for a bi-dimensional closed quantum system. Using IBM quantum computers, we experimentally verify our theoretical findings by doing a full quantum simulation of the optical MZI with biased beam splitters.

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Cited by in corpus (7)

• Coherence and contextuality in a Mach-Zehnder interferometer
• An Updated Quantum Complementarity Principle
• Quantum observable's reality erasure with spacelike-separated operations
• Geometric monotones of violations of quantum realism
• Correlating Local Quantum Reality with Causally Disconnected Choices
• Unveiling quantum complementarity tradeoffs in relativistic scenarios
• Efficient detection of localization transitions using predictability