Quantum state engineering with ququarts: Application for deterministic QKD protocol
- 1 July 2009
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 87 (1)
- https://doi.org/10.1209/0295-5075/87/10008
Abstract
We discuss the proof-of-principle demonstration of the extended deterministic Quantum Key Distribution (QKD) protocol based on ququarts. The experimentalrealization is based on the polarization degrees of freedom of two-mode biphotons, making the process of state preparation,transformationandmeasurementrathersimple.Theschemeusesonlysinglenonlinear crystal for biphoton generation and linear optical elements for their following transformation and can be used as a base for further practical applications. Copyright c �EPLA, 2009Keywords
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