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Though these systems fulfill some points of the above checklist, some open questions remain.
There have never been clear favorite points for quantum computation which are similar to a transistor for silicon-based classical computation for now ( about 2003 ).
New candidates for quantum computation should be explored to further work them on existing systems.
It’s a major challenge for practical quantum computation to maintain the coherence of a quantum device throughout calculation.
The device should be maximally suppressed interferences with the environment to avoid decoherence and the loss of quantum information.
