相关论文: A Design for a Quantum Time Machine

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This paper has been withdrawn: it does not evade the no-go results of Mayers, Lo and Chau, to whom I am most grateful for helpful correspondences.

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This paper has been withdrawn by the author because in the main text some discussion parts were inadvertently added by mistake.

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This paper has been withdrawn as it has been superseded by 0808.2697

This paper has been withdrawn. The main technical result will reappear in the new version of quant-ph/0501003.

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This paper has been withdrawn by the author(s). Please see arXiv:0711.3910 for revision.

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