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arXiv cs/0001014cs.CCquant-ph
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非确定性量子查询与量子通信复杂性

Nondeterministic Quantum Query and Quantum Communication Complexities

Ronald de Wolf

摘要:

我们研究布尔函数f的非确定性量子算法。这样的算法在输入x上有正的接受概率当且仅当f(x)=1。在查询复杂性的设置中,我们证明了布尔函数的非确定性量子复杂性等于它的“非确定性多项式”次数。我们还证明了一个量子与经典的差距1与n的非确定性查询复杂性的总功能。在通信复杂性的设定下,我们证明了两方函数的非确定性量子复杂性等于通信矩阵的非确定性版本的秩的对数。这意味着如果我们不允许任何错误概率,则等式和不相交函数的量子通信复杂性为n+1。我们还展示了一个总函数,其中的非确定性量子通信复杂性是指数小于其经典的对应。

英文摘要:

We study nondeterministic quantum algorithms for Boolean functions f. Such algorithms have positive acceptance probability on input x iff f(x)=1. In the setting of query complexity, we show that the nondeterministic quantum complexity of a Boolean function is equal to its ``nondeterministic polynomial'' degree. We also prove a quantum-vs-classical gap of 1 vs n for nondeterministic query complexity for a total function. In the setting of communication complexity, we show that the nondeterministic quantum complexity of a two-party function is equal to the logarithm of the rank of a nondeterministic version of the communication matrix. This implies that the quantum communication complexities of the equality and disjointness functions are n+1 if we do not allow any error probability. We also exhibit a total function in which the nondeterministic quantum communication complexity is exponentially smaller than its classical counterpart.

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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