Device Independent Quantum Private Query with Finite Number of Entangled Qubits

Autor:	Basak, Jyotirmoy, Ghosh, Bappaditya, Maitra, Arpita, Paul, and Goutam
Rok vydání:	2017
Předmět:	Quantum Physics
Druh dokumentu:	Working Paper
Popis:	In a recent work by Maitra et al. (Phys. Rev. A, 2017), it was shown that the existing Quantum Private Query (QPQ) protocols fail to maintain the database security if the entangled states shared between Alice and Bob are not of a certain form. So it is necessary to certify the states a priori. In this regard, the local CHSH test was proposed. However, the proposed scheme works perfectly for the asymptotic case when we have infinite number of qubits. In this brief report, we upgrade the protocol for finite number of qubits and connect the sample size to the success probability of CHSH test. We also perform a rigorous security analysis of the proposed protocol. Comment: 5 pages, 2 figures, sequel to arXiv:1701.01087
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1705.04570 Zobrazit plný text záznamu View this record from Arxiv