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Journal of the Optical Society of America B

Quantum key distribution using polarization and frequency hyperentangled photons

Chuan Xi Wang, Xiao Li, Wanying Wang, Guangyu Zhang, Gui Lu Long

Published Oct 14, 2009• 14 citations
Publisher

Abstract

We propose a two-step quantum key distribution protocol using frequency and polarization hyperentangled photons. In this protocol, key information is encoded by unitary operations on the hyperentangled photons, and the hyperentangled photons are sent in two steps. We also designed a state measurement device and analyzed the security of the protocol.

DOI
10.1364/josab.26.002072

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We propose a two-step quantum key distribution protocol using frequency and polarization hyperentangled photons. In this protocol, key information is encoded by unitary operations on the hyperentangled photons, and the hyperentangled photons are sent in two steps. We also designed a state measurement device and analyzed the security of the protocol.
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We propose an experimentally feasible scheme for generating a two 2×4×42\times4\times42×4×4 dimensional photons hyperentangled state, entangled in polarization, frequency and spatial mode. This scheme is mainly based on a parametric down-conversion source and cross-Kerr nonlinearities, which avoids the complicated uncertain post-selection. Our method can be easily expanded to the production of hyperentangled states with more photons in multi-dimension. Hence the expectation for vast quantities of information in quantum information processing will possibly come true. Finally, we put forward a realizable quantum key distribution (QKD) protocol based on the high dimensional hyperentangled state.
We propose an experimentally feasible scheme for generating a two 2 × 4 × 4 dimensional photon hyperentangled state, entangled in polarization, frequency and spatial mode. This scheme is mainly based on a parametric down-conversion source and cross-Kerr nonlinearities, which avoids the complicated uncertain post-selection. Our method can be easily expanded to the production of hyperentangled states with more photons in multidimensions. Hence the expectation for vast quantities of information in quantum information processing will possibly come true. Finally, we put forward a realizable quantum key distribution (QKD) protocol based on the high dimensional hyperentangled state.