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arXiv 2004.06439quant-phcs.CC
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带关系组合的量子查询复杂度

The quantum query complexity of composition with a relation

Aleksandrs Belovs, Troy Lee

摘要:

负权重攻击方法$\mathrm{ADV}^\pm(g)$被认为是描述任意布尔函数$g$的有界错误量子查询复杂度的方法,并且也服从完美复合定理$\mathrm{ADV}^\pm(f \circ g^n) = \mathrm{ADV}^\pm(f) \mathrm{ADV}^\pm(g)$。Belovs给出了一个修改版本的负权重的对手的方法,$\mathrm{ADV}_{rel}^\pm(f)$,其特征的有界错误量子查询复杂性的关系$f \subseteq \{0,1\}^n \times [K]$,提供了关系是有效的验证。如果对于每个$a \in [K]$都有$\mathrm{ADV}^\pm(f_a) = o(\mathrm{ADV}_{rel}^\pm(f))$,则关系是有效可验证的,其中$f_a$是定义为$f_a(x) = 1$的布尔函数当且仅当$(x,a) \in f$。本文证明了一个完美的复合定理,它适用于关系$f$与布尔函数$g$ \[ \mathrm{ADV}_{rel}^\pm(f \circ g^n) = \mathrm{ADV}_{rel}^\pm(f) \mathrm{ADV}^\pm(g) \enspace . \]的复合。对于有效可验证的关系$f$,这意味着$Q(f \circ g^n) = Θ( \mathrm{ADV}_{rel}^\pm(f) \mathrm{ADV}^\pm(g) )$。

英文摘要:

The negative weight adversary method, $\mathrm{ADV}^\pm(g)$, is known to characterize the bounded-error quantum query complexity of any Boolean function $g$, and also obeys a perfect composition theorem $\mathrm{ADV}^\pm(f \circ g^n) = \mathrm{ADV}^\pm(f) \mathrm{ADV}^\pm(g)$. Belovs gave a modified version of the negative weight adversary method, $\mathrm{ADV}_{rel}^\pm(f)$, that characterizes the bounded-error quantum query complexity of a relation $f \subseteq \{0,1\}^n \times [K]$, provided the relation is efficiently verifiable. A relation is efficiently verifiable if $\mathrm{ADV}^\pm(f_a) = o(\mathrm{ADV}_{rel}^\pm(f))$ for every $a \in [K]$, where $f_a$ is the Boolean function defined as $f_a(x) = 1$ if and only if $(x,a) \in f$. In this note we show a perfect composition theorem for the composition of a relation $f$ with a Boolean function $g$ \[ \mathrm{ADV}_{rel}^\pm(f \circ g^n) = \mathrm{ADV}_{rel}^\pm(f) \mathrm{ADV}^\pm(g) \enspace . \] For an efficiently verifiable relation $f$ this means $Q(f \circ g^n) = Θ( \mathrm{ADV}_{rel}^\pm(f) \mathrm{ADV}^\pm(g) )$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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