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This paper has been withdrawn by the author, since now all four parts of the review are available as a single file 0804.1639.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.

This paper has been withdrawn by the authors, since the reference citation were not appropriately arranged.

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This paper has been withdrawn by the author.

This paper has been withdrawn by the author(s), as it is superseded by 0708.2385.

The paper has been withdrawn by the authors. See newer and expanded version quant-ph/0606221, published in Europhysics Letters 78, 30004 (2007).

The authors have withdrawn this article [arXiv admin].

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This paper has been withdrawn by the author due to an error in the proof.

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This paper has been withdrawn by the author(s), due a crucial sign error in conclusion .

The article has been withdrawn by the author.

This paper was withdrawn by the authors.

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This paper has been withdrawn.