Experimental generation and characterization of single-photon hybrid ququarts based on polarization-orbital angular momentum encoding

Details Experimental generation and characterization of single-photon hybrid ququarts based on polarization-orbital angular momentum encoding Experimental generation and characterization of single-photon hybrid ququarts based on polarization-orbital angular momentum encoding

2010-09-15

arxiv.org/abs/1009.2867v1

Physical Review A 81, 052317 (2010)

Physics

Quantum Physics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevA.81.052317

High-dimensional quantum states, or qudits, represent a promising resource in the quantum information field. Here we present the experimental generation of four-dimensional quantum states, or ququarts, encoded in the polarization and orbital angular momentum of a single photon. Our novel technique, based on the q-plate device, allows to prepare and measure the ququart in all five mutually unbiased bases. We report the reconstruction of the four dimensional density matrix through the tomographic procedure for different ququart states.

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