Steane code

The Steane code is a tool in quantum error correction introduced by Andrew Steane in 1996. It is a perfect CSS code, using the classical binary self-dual [7,4,3] Hamming code to correct for qubit flip errors (X errors) and the dual of the Hamming code, the [7,3,3] code, to correct for phase flip errors (Z errors). The Steane code is able to correct arbitrary single qubit errors.

In the stabilizer formalism, the Steane code has 6 generators, and the check matrix in standard form is

${\begin{bmatrix}H&0\\0&H\end{bmatrix}}$

where H is the parity-check matrix of the Hamming code and is given by

In particular,

$H={\begin{bmatrix}1&0&0&1&0&1&1\\0&1&0&1&1&0&1\\0&0&1&0&1&1&1\end{bmatrix}}$

References

• Steane, Andrew (1996). "Multiple-Particle Interference and Quantum Error Correction". Proc. Roy. Soc. Lond. A. 452: 2551-2577.