4.5 Article

A simple formula for the average gate fidelity of a quantum dynamical operation

Journal

PHYSICS LETTERS A
Volume 303, Issue 4, Pages 249-252

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/S0375-9601(02)01272-0

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This Letter presents a simple formula for the average fidelity between a unitary quantum gate and a general quantum operation on a qudit, generalizing the formula for qubits found by Bowdrey et al. [Phys. Lett. A 294 (2002) 258]. This formula may be useful for experimental determination of average gate fidelity. We also give a simplified proof of a formula due to Horodecki et al. [Phys. Rev. A 60 (1999) 1888], connecting average gate fidelity to entanglement fidelity. (C) 2002 Elsevier Science B.V. All rights reserved.

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