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arXiv · 1601.02029

Self-assisted complete maximally hyperentangled state analysis via the cross-Kerr nonlinearity

Xihan Li·Shohini Ghose
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Abstract

We present two complete maximally hyperentangled state analysis protocols for photons entangled in the polarization and spatial-mode degrees of freedom. The first protocol is a hyperentangled Bell state analysis scheme for two photons and the second is a hyperentangled Greenberger-Horne- Zeilinger (GHZ) state analysis scheme for three photons. In each scheme, a set of mutually orthogonal hyperentangled basis states are completely and deterministically discriminated with the aid of cross-Kerr nonlinearities and linear optics. We also generalize the schemes to unambiguously analyze the N-photon hyperentangled GHZ state. Compared with previous protocols, our schemes greatly simplify the discrimination process and reduce the requirements on nonlinearities by using the measured spatial-mode state to assist in the analysis of the polarization state. These advantages make our schemes useful for practical applications in long-distance high capacity quantum communication.

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Xihan Li, Shohini Ghose. 2016-01-08. Self-assisted complete maximally hyperentangled state analysis via the cross-Kerr nonlinearity. https://doi.org/10.1103/physreva.93.022302

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