Related papers: Persistent edge current in fractional quantum Hall…

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This paper has been withdrawn by the author. A revised and expanded version is gr-qc/9907028 (Phys.Rev. D60 (1999) 104043).

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The effect of the random quantum transverse field $\Omega$

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This paper is withdrawn. See quant-ph/9806031 for a discussion.

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This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

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