Quantum Private Information Retrieval with Sublinear Communication Complexity

Quantum Private Information Retrieval with Sublinear Communication Complexity
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DOI:
10.4086/toc.2012.v008a016
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发表时间:
2011-07
期刊:
Theory Comput.
影响因子:
--
通讯作者:
F. Gall
F. Gall
中科院分区:
其他
文献类型:
--
作者:
F. Gall

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本文提出了一个用于私人信息检索的量子协议,在单服务器的情况下,具有信息理论隐私,具有O(\sqrt{n})-qubit通信复杂度,其中n表示数据库的大小。相比之下,任何经典协议都必须在这种设置中使用\Omega(n)位通信。
This note presents a quantum protocol for private information retrieval, in the single-server case and with information-theoretical privacy, that has O(\sqrt{n})-qubit communication complexity, where n denotes the size of the database. In comparison, it is known that any classical protocol must use \Omega(n) bits of communication in this setting.