A curve attaining the Hasse-Weil bound is called a maximal curve. Usually
classical error-correcting codes obtained from a maximal curve have good
parameters. However, the quantum stabilizer codes obtained from such classical
error-correcting codes via Euclidean or Hermitian self-orthogonality do not
always possess good parameters. In this paper, the Hermitian self-orthogonality
of algebraic geometry codes obtained from two maximal curves is investigated.
It turns out that the stabilizer quantum codes produced from such Hermitian
self-orthogonal classical codes have good parameters