DOI: 10.1016/S0375-9601(02)01272-0
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摘要: This Letter presents a simple formula for the average fidelity between unitary quantum gate and general operation on qudit, generalizing qubits found by Bowdrey et al. [Phys. Lett. A 294 (2002) 258]. may be useful experimental determination of fidelity. We also give simplified proof due to Horodecki Rev. 60 (1999) 1888], connecting entanglement