Equation 3 · Part 1 · Error Correction Is the Whole Problem in Quantum Computing
Symbol S_i
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The technique that makes this work is the stabiliser formalism, given its general fault-tolerant treatment by Gottesman [ 4 ] . A code is defined not by listing its states but by naming a set of commuting Pauli operators — the stabiliser generators — whose joint +1 eigenspace is the code space:
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