Whether a quantum operating system could ever actually make sense?

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Worth flagging upfront that this one is a personal blog post from an individual quantum computing hobbyist, written after attending Qiskit Summer School, rather than a peer reviewed research finding or institutional announcement. It's a genuinely interesting thought experiment though, and worth discussing on those terms. I found it to be very interesting

The blogger's core question is whether something like a classical operating system or CPU could have a genuine quantum equivalent, since quantum computation is theoretically an extension of classical computation, and any classical bit string can in principle be represented and manipulated in quantum form. He built a simple quantum circuit implementing a basic arithmetic logic unit, using six qubits, three to hold an operation address, two for inputs, and one as a data bus, supporting operations like XOR, AND, OR, NOT and bit shifting.

The genuinely interesting part is where the idea runs into real practical trouble. Classical computers rely on cheap, easy copying and moving of data between operations, but quantum systems are fundamentally limited by the no cloning theorem, meaning quantum information can't simply be copied the way a classical bit can. Every quantum operation also has to be reversible, meaning you eventually need to undo each computation to get clean qubits back for reuse, which the author points out is a genuinely different and more expensive constraint than anything a classical CPU deals with.

He also raises the measurement problem directly. A genuine quantum OS would essentially be a program existing in superposition that collapses into one specific classical outcome the moment you actually measure it, which raises real questions about whether that's even a coherent concept for something meant to run continuously and interactively the way an operating system actually needs to.

His own honest conclusion is that while mapping a classical system into quantum form is theoretically possible. Current quantum hardware simply doesn't have enough coherence time to make anything like this practically useful yet, and there's a deeper unresolved question buried in the whole idea, what's actually the point of a classical computer managing a quantum computer that's essentially just simulating a classical computer inside itself

Are quantum computers turing complete?dpbm.vercel.app