▲ | jessriedel 3 days ago | |||||||
Just an example to expand on what others are saying: in the N^2-qubit Shor code, the X information is recorded redundantly in N disjoint sets of N qubits each, and the Z information is recorded redundantly in a different partitioning of N disjoint sets of N qubits each. You could literally have N observers each make separate measurements on disjoint regions of space and all access the X information about the qubit. And likewise for Z. In that sense it's a repetition code. | ||||||||
▲ | adastra22 3 days ago | parent [-] | |||||||
That’s also correct but not what the sibling comments are saying ;) There are quantum error correction methods which more resemble error correction codes rather than replication, and that resemblance is fundamental: they ARE classical error correction codes transposed into quantum operations. | ||||||||
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