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Permutation-invariant codes encoding more than one qubit
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A permutation-invariant code on m qubits is a subspace of the symmetric subspace of the m qubits. We derive permutation-invariant codes that can encode an increasing amount of quantum information while suppressing leading order spontaneous decay errors. To prove the result, we use elementary number theory with prior theory on permutation invariant codes and quantum error correction.
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Cited by 1 Pith paper
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An angular momentum approach to quantum insertion errors
A two-measurement syndrome extraction and teleportation-based recovery corrects single qubit insertion errors on gapped permutation-invariant codes.
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