Information holes in the field of quantum computers
One of the main obstacles is to protect the arbitrary interaction of cubes with the outside world. Because at the same time the cube loses the quantum component. Such a process is called decoherence. In particular, the decoherence transfers to the world around the world the information recorded in the cubes. And it is still unclear whether it is possible to restore the data lost as a result.
Although the discovery of Italian mathematicians is more a theoretical than practical, it gives a specific choice of the foundation of the logic of a quantum computer.
It turns out that even when a way to restore the information transferred to the world is found, this can only be done for cubes with two or three basic conditions. For a larger number of basic conditions, this is impossible to do this even theoretically.