It is known that in a classical computer we can't generate a purely random number by deterministic process. I am taking a course in Quantum Computing, recently I learnt that using state we can generate a deterministic process which will produce random number $|0\rangle$ and $|1 \rangle $. But, I am not aware of the physical implementation and very excited to know about it. I have searched online and got this paper, but this needs knowledge of architecture inside QC I think.
Can anyone explain(from basic please) how we can develop a deterministic process to generate $|0\rangle$ and $|1 \rangle $ random-ly? Also explain please how that process is a deterministic one.