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Wigner function and the entanglement of a quantized Bessel-Gaussian vortex state of a quantized radiation field

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【作者】 朱开成； 李绍新； 唐英； 郑小娟； 唐慧琴；

【Author】 Zhu Kai-Cheng a),Li Shao-Xin b),Tang Ying a),Zheng Xiao-Juan a),and Tang Hui-Qin a) a) School of Physical Science and Technology,Central South University,Changsha 410083,China b) Physical Staff Room,Guangdong Medical College,Dongguan 523808,China

【机构】 School of Physical Science and Technology,Central South University； Physical Staff Room,Guangdong Medical College；

【摘要】 A new kind of quantum non-Gaussian state with a vortex structure,termed a Bessel-Gaussian vortex state,is constructed,which is an eigenstate of the sum of squared annihilation operators a2+b2.The Wigner function of the quantum vortex state is derived and exhibits negativity which is an indication of nonclassicality.It is also found that a quantized vortex state is always in entanglement.And a scheme for generating such quantized vortex states is proposed.

【Abstract】 A new kind of quantum non-Gaussian state with a vortex structure,termed a Bessel-Gaussian vortex state,is constructed,which is an eigenstate of the sum of squared annihilation operators a2+b2.The Wigner function of the quantum vortex state is derived and exhibits negativity which is an indication of nonclassicality.It is also found that a quantized vortex state is always in entanglement.And a scheme for generating such quantized vortex states is proposed.

【关键词】 Wigner distribution function； quantized vortex state； quantum non-Gaussian state；
【Key words】 Wigner distribution function； quantized vortex state； quantum non-Gaussian state；
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2012年08期
  • 【分类号】O431.2
  • 【下载频次】19
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