Related papers: Charge State Measurement and Persistent Current in…

This paper has been withdrawn since the material in these notes has been updated, and extended, in hep-th/0409031 and hep-th/0409033, and in work to follow.

This paper has been withdrawn by the author, due to errors in the figures.

This paper has been withdrawn by the author, due to errors in the figures.

This paper has been withdrawn by the authors due to new experimental results.

The paper was withdrawn by the author. It contained various errors.

This paper was withdrawn because subsequent measurements produced results not always consistent with the ones presented in the paper.

This paper has been withdrawn due to a request of the first author to exclude his name from the author list and to motivate sufficiently the appliclication of the used model for antiferromagnetic insulators.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author, due to a misunderstanding about publication.

This has been withdrawn by the author. A rewrite of some of the material is currently in progress.

This paper has been withdrawn by the author due to need for more improvement.

This paper has been withdrawn by the authors.

The paper has been withdraw by authors

This paper has been withdrawn by the author, due to the fact that a similar paper (quant-ph/9904075) has been published.

This paper has been withdrawn by the author due to a crucial sign error in equation 1

This paper has been temprally withdrawn by the author

This paper has been withdrawn.

This paper has been withdrawn due to an error in figure 5.

This paper has been withdrawn by the author due to a crucial sign error in equation 1

The paper was withdrawn by the author. Further research is needed.