In my/Gell-Mann's theory, the universe decoheres the box, randomising its phases, and it in turn decoheres its contents. If you can find a perfect disturbance

In my/Gell-Mann's theory, the universe decoheres the box, randomising its phases, and it in turn decoheres its contents. If you can find a perfect disturbance barrier, you can put qubits inside. Now the problems which would remain be: how to initialise them, and how to read out the final result...