摘要
We present a modified protocol for the realization of a quantum private query process on a classical database.Using one-qubit query and CNOT operation,the query process can be realized in a two-mode database.In the query process,the data privacy is preserved as the sender would not reveal any information about the database besides her query information,and the database provider cannot retain any information about the query.We implement the quantum private query protocol in a nuclear magnetic resonance system.The density matrix of the memory registers are constructed.
作者
王川
郝亮
赵连洁
WANG Chuan;HAO Liang;ZHAO Lian-Jie(School of Science,Beijing University of Posts and Telecommunications,Beijing 100876;Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics,Tsinghua University,Beijing 100084;Key Laboratory of Optical Communication and Lightwave Technologies,Beijing University of Posts and Telecommunications,Beijing 100876)
基金
by the National Basic Research Program of China under Grant Nos 2010CB923202 and 2011CB921602
the Specialized Research Fund for the Doctoral Program of China under Grant No 20090005120008
the National Natural Science Foundation of China under Grant Nos 10947151 and 10874098.
