  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.
