Related papers: How to securely decouple quantum systems: local sh…
The paper has been withdrawn by the author.
This paper has been withdrawn.
Although the results are correct, it was pointed out that the results follow from some previously known results. Accordingly, this version of the paper is withdrawn by the authors.
This paper has been withdrawn by the author due to a crucial error in the definition of homomorphism.
This paper has been withdrawn.
This paper has been withdrawn by the authors due to an unlikely results.
This paper has been withdrawn by the author.
This paper has been withdrawn due to security loophole. We thank Dr G. P. he for pointing this to us.
This paper has been withdrawn by the author(s), due to some technical problem.
This paper has been withdrawn by the authors
This paper has been withdrawn by the author.
This paper has been withdrawn by the author since the comments have been withdrawn.
This paper has been withdrawn by the author. This paper is now obsolete. For a solution please see: arXiv:/1205.4265.
This paper has been withdrawn by the author, due a crucial error in Eq. 6.
This paper has been withdrawn.
This paper has been withdrawn by the author
This paper has been withdrawn by the author due to unspecified problems.
This paper was withdrawn and incorporated into section II of cond-mat/0310512
This article has been withdrawn by the authors.
This paper has been withdrawn by the author, since now all four parts of the review are available as a single file 0804.1639. I also made some revision of the text in order to avoid misprints and some inaccurate expressions.