2 problems

An impure $[[n,k,3]]$ stabilizer code is a quantum stabilizer code encoding $k$ logical qubits into $n$ physical qubits, with minimum distance $3$ and with nontrivial stabilizer el…

Let a qubit permutation-invariant quantum error-correcting code correct errors of weight at most $t$, and let $n_{\rm \min}(t)$ denote the smallest block length among such codes. Th…