A strict materialist typically holds that everything that exists is fundamentally physical or material in nature, and that all phenomena, including consciousness and mental states, can ultimately be explained in terms of physical processes.
Regarding quantum physics, a strict materialist would generally interpret it as a physical theory describing the behavior of matter and energy at microscopic scales. They would view the mathematical formalism of quantum mechanics and its experimental results as revealing underlying physical processes, even if these processes challenge classical intuitions about determinism and locality.
In other words, a strict materialist does not see quantum physics as implying anything non-material or supernatural. Instead, they would consider it a powerful and possibly incomplete physical theory that still fits within a naturalistic worldview. They would likely be committed to the idea that quantum phenomena have physical explanations, even if those explanations require rethinking classical concepts, rather than appealing to immaterial substances, dualism, or non-physical causes.
To summarize: a strict materialist accepts quantum physics as describing real physical phenomena and expects that its mysteries and paradoxes will eventually be fully understood in physical terms, without invoking anything beyond the material world.
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