Near-deterministic Preparation for Multi-photon GHZ State Based on Quantum Non-demolition Measurement

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• 作者：Chunhong Zheng (1) (2)
  Yongjian Gu (2)
  Libo Chen (1)
  Bingquan Chen (1)
  Hongyang Ma (1)
  Tianhui Qiu (1)
  
  1. School of Sciences ; Qingdao Technological University ; Qingdao ; 266033 ; China
  2. Department of Physics ; Ocean University of China ; Qingdao ; 266100 ; China
  
• 关键词：GHZ state ; Weak cross ; Kerr nonlinearity ; X homodyne measurement ; Minus conditional phase shift
• 刊名：International Journal of Theoretical Physics
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：54
• 期：4
• 页码：1216-1224
• 全文大小：454 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Physics
  Quantum Physics
  Elementary Particles and Quantum Field Theory
  Mathematical and Computational Physics
  
• 出版者：Springer Netherlands
• ISSN：1572-9575

文摘

This study presents an efficient scheme to generate an arbitrary multi-photon polarization-entangled GHZ state with quantum non-demolition measurement based on weak cross-Kerr nonlinearity. The distinct feature of the present scheme is that it works in a near-deterministic way in principle. Compared with the previous protocols, our scheme consumes less weak cross-Kerr nonlinear resources and there is no need for minus conditional phase shifts, which make us more confident in the experimental feasibility of the proposed scheme.