相关论文: The four-qubit singlet state and decoherence-free …

This paper has been withdrawn

This paper has been withdrawn by the author. It will be published again after submission to a journal.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn.

%auto-ignore Paper has been withdrawn by the author.

This paper has been withdrawn by the author

The paper has bene withdrawn by the author.

This paper was withdrawn by the author. It turns out that similar ideas have been presented before. The author apologizes.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author(s) for revision.

This paper is withdrawn by the author. See math.GT/9811093 for replacement.

This paper has been withdrawn by the author.

This paper has been withdrawn

This paper has been withdrawn.

This paper has been withdrawn by the authors.

This paper has been withdrawn, and will be superseded by another submission.

This paper has been withdrawn as it has been superseded by postings arXiv:quant-ph/0702147 and arXiv:0712.2935

This paper has been withdrawn.