Decoder for Nonbinary CWS Quantum Codes
  We present a decoder for nonbinary CWS quantum codes using the structure of union codes. The decoder runs in two steps: first we use a union of stabilizer codes to detect a sequence of errors, and second we build a new code, called union code, that allows to correct the errors. 
Nolmar Melo and Douglas F.G. Santiago and Renato Portugal
cs.IT math.IT quant-ph