论文标题
统一量子流程的无附件认证
Ancilla-free certification of unitary quantum processes
论文作者
论文摘要
我们研究有效的量子认证算法,用于使用无actilla进行统一量子过程。先前的研究表明,可以区分一个未知的单一$ u $与已知或未知的单一$ v $中的$ o(\ varepsilon^{ - 2})$使用单位的固定尺寸的已知或未知单位$ v $的用途,始终使用choi状态,因此始终使用choi状态,因此始终使用choi状态,因此始终使用choi状态。我们给出了一种算法,该算法用$ o(\ varepsilon^{ - 1})$使用统一的使用情况区分了两种情况,使用较少或没有任何actilla,优于先前的相关结果。
We study efficient quantum certification algorithms for unitary quantum process using no ancilla. Previous study showed that one can distinguish whether an unknown unitary $U$ is equal to or $\varepsilon$-far from a known or unknown unitary $V$ in fixed dimension with $O(\varepsilon^{-2})$ uses of the unitary, in which the Choi state is used and thus a high dimensional ancilla system is always needed. We give an algorithm that distinguishes the two cases with $O(\varepsilon^{-1})$ uses of the unitary, using fewer or no ancilla, outperforming previous relevant results.