Related papers: Positional decoherence

This paper has been withdrawn. (Reason) Its contents have been entirely superseded by the contents of the articles arXiv:0809.3444 and arXiv:0705.3070. There is no profitable reason to keep it alive. No material on it is however wrong.

%auto-ignore The paper has been withdrawn by authors. The completely revised version can be found under the following preprint-no: hep-ph/9910282.

This paper has been withdrawn by the authors; its contents are superseded by that of hep-th/0105305 and hep-th/0212275.

This paper has been withdrawn by the author, as it is now incorporated in 0901.4506 (v4)

This paper has been withdrawn by the author.

This paper has been withdrawn by the author, due to necessity of revision.

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This paper has been withdrawn by the authors. It has been superseded by hep-th/0309154

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This paper has been withdrawn by the author because the conclusions reached in it are incorrect.

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This paper has been withdrawn by the author, because a profoundly overhauled and improved version, also with a new title and two more authors, has now been submitted to the arXiv, with no. hep-ph/0310059. In view of the elapsed time and the…

This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.

This paper has been withdrawn by the author; see the much expanded, improved, and generalized version at arXiv:0811.2073.

This paper has been withdrawn by the author.