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In this paper, we present an efficient scheme for the complete analysis of the four-dimensional Bell state of the photon system in the path degree of freedom, resorting to the weak cross-Kerr nonlinearity and linear optics. In our scheme, the measurements on two probe coherent states are used for obtaining the bit information of high-dimensional entanglement, and the linear optical elements and single-photon detectors are used for obtaining the relative phase information of high-dimensional entanglement. With these two independent processes, the 16 orthogonal four-dimensional path Bell states can be completely distinguished from each other. This simple and realizable scheme may have useful applications in the quantum information technology based on high-dimensional entanglement.
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Z. D. Zeng (Tue,) studied this question.
synapsesocial.com/papers/68e6822cb6db64358760b434 — DOI: https://doi.org/10.1364/josab.525949
Z. D. Zeng
Center for High Pressure Science and Technology Advanced Research
Journal of the Optical Society of America B
Chinese Academy of Sciences
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