New findings debunk previous wisdom that solid-state qubits need to be super dilute in an ultra-clean material to achieve long lifetimes. Instead, cram lots of rare-earth ions into a crystal and some will form pairs that act as highly coherent qubits. (IMAGE)
Caption
Within a dense system some terbium ions form pair states. Because of their unique properties, these pairs are blind to the single terbium ions nearby that would cause them to lose their quantum information. Protected from their messy environment, they can act as qubits with surprisingly long coherence lifetimes.
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Ella Maru Studios.
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