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Deriving |𝐶𝐶𝑍⟩ magic states from |𝐶𝐶𝐶𝑍⟩?

The simplest thing you could possibly do is to turn one $|C^nZ\rangle$ state into $O(1/2^n)$ $|CCZ\rangle$ states by measuring out $n-3$ of the qubits and discarding if any of the measurement results ...
Craig Gidney's user avatar
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