Experimental Quantum Private Queries with linear optics

Details Experimental Quantum Private Queries with linear optics Experimental Quantum Private Queries with linear optics

2009-02-02

arxiv.org/abs/0902.0222v3

Phys. Rev. A 80, 010302(R) (2009)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

The Quantum Private Query is a quantum cryptographic protocol to recover information from a database, preserving both user and data privacy: the user can test whether someone has retained information on which query was asked, and the database provider can test the quantity of information released. Here we introduce a new variant Quantum Private Query algorithm which admits a simple linear optical implementation: it employs the photon's momentum (or time slot) as address qubits and its polarization as bus qubit. A proof-of-principle experimental realization is implemented.

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