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arXiv 2001.05553quant-phcs.CC
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布尔隐匹配问题推广的指数量子通信约简

Exponential quantum communication reductions from generalizations of the Boolean Hidden Matching problem

João F. Doriguello, Ashley Montanaro

摘要:

在这项工作中,我们重新审视布尔隐藏匹配通信问题,这是单向模型中的第一个通信问题,以证明指数经典量子通信分离。在这个问题中,爱丽丝的比特根据鲍勃持有的分区配对。这些对使用奇偶校验函数进行压缩,并且保证最终的位串等于Bob持有的另一个位串或其补码。问题是决定哪种情况是正确的。在这里,我们推广的布尔隐藏匹配问题,取代奇偶校验功能与任意布尔函数$f$。根据$f$的符号度,给出了有效的通信协议。如果它的符号度小于或等于1,我们证明了一个有效的经典协议。如果它的符号度小于或等于$2$,我们证明了一个有效的量子协议。然后,我们完全表征的经典硬度的所有对称函数$f$的符号度大于或等于$2$,除了一个家庭的特定情况下。我们还证明了,通过傅立叶分析,一个经典的下界为任何功能$f$,其纯高的程度是大于或等于$2$。同样,我们证明,也通过傅立叶分析,量子下界的任何功能$f$,其纯高的程度是大于或等于$3$。这些结果给出了一个新的指数经典量子通信分离的大家庭。

英文摘要:

In this work we revisit the Boolean Hidden Matching communication problem, which was the first communication problem in the one-way model to demonstrate an exponential classical-quantum communication separation. In this problem, Alice's bits are matched into pairs according to a partition that Bob holds. These pairs are compressed using a Parity function and it is promised that the final bit-string is equal either to another bit-string Bob holds, or its complement. The problem is to decide which case is the correct one. Here we generalize the Boolean Hidden Matching problem by replacing the parity function with an arbitrary Boolean function $f$. Efficient communication protocols are presented depending on the sign-degree of $f$. If its sign-degree is less than or equal to 1, we show an efficient classical protocol. If its sign-degree is less than or equal to $2$, we show an efficient quantum protocol. We then completely characterize the classical hardness of all symmetric functions $f$ of sign-degree greater than or equal to $2$, except for one family of specific cases. We also prove, via Fourier analysis, a classical lower bound for any function $f$ whose pure high degree is greater than or equal to $2$. Similarly, we prove, also via Fourier analysis, a quantum lower bound for any function $f$ whose pure high degree is greater than or equal to $3$. These results give a large family of new exponential classical-quantum communication separations.

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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