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:
影响因子:
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通讯作者:
F. Gall
中科院分区:
文献类型:
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作者:
F. Gall
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.