Can Qubit Errors Be Corrected
Subhash C. Kak · arXiv (Cornell University) · 2002
This note examines assumptions at the basis of the recently proposed quantum error-correcting codes. It is shown that these codes can correct only a subset of errors, and are unable to correct small phase errors which can have disastrous consequences for a quantum computation. This shortcomings will restrict their usefulness in real applications. Colours seen by candle-light Will not look the same by day.-Robert Browning