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Abstract: Many results have been recently obtained regarding the power of hypotheticalclosed time-like curves CTCs in quantum computation. Here we show that theone-way model of measurement-based quantum computation encompasses in a naturalway the CTC model proposed by Bennett, Schumacher and Svetlichny. We identify aclass of CTCs in this model that can be simulated deterministically and pointto a fundamental limitation of Deutsch-s CTC model which leads to predictionsconflicting with those of the one-way model.



Author: Raphael Dias da Silva, Ernesto F. Galvao, Elham Kashefi

Source: https://arxiv.org/







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