Concatenated codes for amplitude damping
Tyler Jackson, Markus Grassl, Bei Zeng · 2016
We discuss a method to construct quantum code correcting amplitude-damping errors via code concatenation. The inner codes are chosen as asymmetric Calderbank-Shor-Steane (CSS) codes. By concatenating with outer code-correcting symmetric errors, many new codes with good parameters are found, which outperform amplitude damping codes obtained by any previously known construction.