This article mentions that polarization of classical light can be used as a qubit. link
Are there other physical quantities in the classical world which can be act as qubit.
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Any two level quantum system can be used as a qubit, examples include:
These are some examples, but any qubit would probably fall on any one of these examples (spin projection/polarization, configuration/occupation, energy states).
Here is also response to a similar question that goes into more specific details https://physics.stackexchange.com/a/298537/168640 and a review of qubit implementations from quantum daily A Detailed Review of Qubit Implementations for Quantum Computing
I might have missed the point of the question. If this is about classical properties used as quantum logic gates, then this would be out of my scope. It is a not so popular idea and I would have to read what that really means.
Looking at the citing articles: there is a clear similar candidate, spin waves. See for example Khitun and Wang "Non-volatile magnonic logic circuits engineering." J.App.Phys. 110.3 (2011). The same way that several photons produce a classical light wave. The magnons (quanta of magnetization) produce a macroscopic magnetization wave due to the precessions of spins (or equivalently the magnetic moments) in the material. I would be an obvious analogue but I do not know what are the drawbacks with respect to light.