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Abstract: It was shown in T. Morimae, Phys. Rev. A {\bf81}, 060307R 2010 that thegate fidelity of an inaccurate one-way quantum computation is upper bounded bya decreasing function of the amount of entanglement in the register. This meansthat a strong entanglement causes the low gate fidelity in the one-way quantumcomputation with inaccurate measurements. In this paper, we derive similarentanglement-fidelity relations for the inaccurate ancilla-driven quantumcomputation. These relations again imply that a strong entanglement in theregister causes the low gate fidelity in the ancilla-driven quantum computationif the measurements on the ancilla are inaccurate.



Author: Tomoyuki Morimae, Jonas Kahn

Source: https://arxiv.org/







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