Related papers: Two-dimensional array of multicolored upconverted …

This paper has been withdrawn by the authors. It has been superseded by hep-th/0309154

This paper has been withdrawn by the authors as they feel it inappropriate to publish this paper for the time being.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authour.

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn.

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This paper has been retracted.

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The authors have withdrawn this paper.

This paper has been withdrawn since it was an inadvertant double submission. An updated version of the original submission can be found at quant-ph/0505131

This has been withdrawn by the author.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

The paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors; the main conclusion is incorrect, as some of the crucial calculations were not properly converged.

This paper has been withdrawn by the authors due to an unlikely results.

This paper has been withdrawn