Determinism means no randomness.
Absolutely NO. You are referring to strict Causal Determinism. I go with Popper's definition of determinism in terms of predictability also, in his book
The Open Universe. I call this functional determinism. Popper argued against Classical Causal Determinism, and considered it indeterminate.
Determinism from the perspective of Quantum Mechanics,
https://www.quantamagazine.org/how-randomness-can-arise-from-determinism-20191014/
How Randomness Can Arise From Determinism
Playing with a simple bean machine illustrates how deterministic laws can produce probabilistic, random-seeming behavior.
s nature inherently random? According to some interpretations of quantum mechanics, it is, explaining why we can’t precisely predict the motions of single particles. In the famous
double-slit experiment (which, as
Richard Feynman declared, “has in it the heart of quantum mechanics”), we cannot predict where exactly an individual photon passing through two slits will land on the photo-sensitive wall on the other side. But we can make extremely precise predictions of the distribution of multiple particles, suggesting that nature may be deterministic after all. Indeed, we can predict to many decimal places what the distribution of billions of photons shot at the double slit will look like.
This dichotomy between unpredictable individual behavior and precise group behavior is not unique to quantum mechanics. There are many novel and strange aspects of quantum physics — particle-wave duality, quantum entanglement and the uncertainty principle, for instance — but probabilistic equations that give precise predictions of ensemble behavior are not among them. We see this phenomenon wherever very large numbers of like elements interact, such as in
thermodynamics, where we can predict collective measures like heat and pressure with precision, though we may be completely ignorant about the paths taken by individual molecules.
In our
August puzzle, we debated whether randomness or determinism lies at the heart of quantum mechanics, which I characterized as team B (Niels Bohr) versus team E (Albert Einstein). Team B sees the unpredictability of particle behavior as evidence that at the fundamental level of the universe, determinism is replaced by intrinsic, objective randomness. Team E contends that this randomness is merely a sign of our ignorance of a deeper level of deterministic causation."
The rest of the article is na interesting read,