Controlling Spin Squeezing in One-Axis Twisting with Decay

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• 作者：Xiao-Jie Yi (1)
  Guo-Qiang Huang (2)
  Jian-Min Wang (1)
  
• 关键词：Quantum entanglement ; Spin squeezing ; Frozen ; spin approximation ; Decay
• 刊名：International Journal of Theoretical Physics
• 出版年：2013
• 出版时间：October 2013
• 年：2013
• 卷：52
• 期：10
• 页码：3376-3380
• 全文大小：237KB
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• 作者单位：Xiao-Jie Yi (1)
  Guo-Qiang Huang (2)
  Jian-Min Wang (1)
  
  1. College of Communication and Electron, Jiangxi Science and Technology Normal University, Nanchang, 330013, People鈥檚 Republic of China
  2. Jiangxi University of Finance and Economics, Nanchang, 330013, People鈥檚 Republic of China
  
• ISSN：1572-9575

文摘

We investigate how an appropriate choice of the external field allows one to control spin squeezing of a collective spin governed by one-axis twisting with decay. By adopting frozen-spin approximation, we succussed in obtaining analytical expressions of the optimally squeezing angle and the spin squeezing parameter. The squeezing parameter is a periodical function, the period depends on the decay rate and the strength of the linear interaction, while the degree of squeezing is only determined by the external field, the smaller external field induces the stronger spin squeezing.