The interaction with the environment has a significant negative impact on any physical implementation of a unitary gate or a quantum channel. The characterization of the quality of such implementations is, hence, of utmost importance for quantum computation from both experimental and theoretical points of view. This paper aims to obtain a more natural expression of the average gate fidelity so that only measurements over a number of pure states need to be performed to verify F̄ experimentally.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 1 Jan 2003|