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Chinese Physics B

Generation of a four-particle entangled state via cross-Kerr nonlinearity

Zhao Li-Fang, Lai Bo-Hui, Feng Mei, Yu Ya-Fei, Feng Xun-Li, Zhi‐Ming Zhang

Published Sep 1, 2010• 9 citations
Publisher

Abstract

We propose a scheme for generating a genuine four-particle polarisation entangled state | χ 00) that has many interesting entanglement properties and potential applications in quantum information processing. In our scheme, we use the weak cross-Kerr nonlinear interaction between field-modes and the non-demolition measurement method based on highly efficient homodyne detection, which is feasible under the current experiment conditions.

DOI
10.1088/1674-1056/19/9/094207

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We propose a scheme for generating a genuine four-particle polarisation entangled state | χ 00) that has many interesting entanglement properties and potential applications in quantum information processing. In our scheme, we use the weak cross-Kerr nonlinear interaction between field-modes and the non-demolition measurement method based on highly efficient homodyne detection, which is feasible under the current experiment conditions.
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We propose a scheme for generating entangled states of light fields. This scheme only requires the cross-Kerr nonlinear interaction between coherent light-beams, followed by a homodyne detection. Therefore, this scheme is within the reach of current technology. We study in detail the generation of the entangled states between two modes, and that among three modes. In addition to the Bell states between two modes and the W states among three modes, we find plentiful new kinds of entangled states. Finally, the scheme can be extend to generate the entangled states among more than three modes.