Preparation of Six-photon Cluster State and Quantum State Sharing of Unknown Two-photon State Based on Weak Cross-Kerr Nonlinearity

• DOI: 10.1007/s10773-015-2559-5
• Publication Date: 2015-02-18T06:37:17Z
• Authors: Kuangwei Xiong; Yan Zhao; Yanlin Liao; Wen Zhang
• Keywords: Beam splitter; Kerr nonlinearity

We propose a nearly deterministic scheme for generating a six-photon polarization-entangled cluster state via the weak cross-Kerr nonlinearity combined with linear optics elements such as polarization beam splitters (PBSs), beam splitters, etc. Besides, by using the six-photon cluster state as the quantum channel, we propose a scheme for quantum state sharing (QSTS) of an unknown two-photon polarization state based on the weak cross-Kerr medias and linear optics elements. With the help of X quadrature homodyne measurements, our two schemes can be realized in an almost deterministic way.