Experimental quantum private queries with linear optics
- 8 July 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 80 (1), 010302
- https://doi.org/10.1103/physreva.80.010302
Abstract
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 amount of information released. Here we discuss a variant of the quantum private query algorithm that 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.Keywords
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