Comment on "Quantum convolutional error-correcting codes" (2 pages)

H. F. Chau

H. F. Chau

Antonio Carlos Aido de Almeida, Reginaldo Palazzo

In this Comment we present a counterexample to theorems 2 and 3 from Chau [Phys. Rev. A 58, 905 (1998)] regarding quantum convolutional codes. © 2005 The American Physical Society.

T.G. Marshall

Hanwei Xiao, Xiaoguang Chen

H. F. Chau

In their Comment, de Almeida and Palazzo ͓Phys.Rev. A 72, 026301 ͑2005͔͒ discovered an error in my earlier paper concerning the construction of quantum convolutional codes ͓Phys.Rev. A 58, 905 ͑1998͔͒.This error can be repaired by modifying the method of code construction.