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

作　　者：朱开成 李绍新 唐英 郑小娟 唐慧琴 

机构地区：[1]School of Physical Science and Technology,Central South University [2]Physical Staff Room,Guangdong Medical College

出　　处：《Chinese Physics B》2012年第8期234-240,共7页中国物理B（英文版）

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.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 

分 类 号：O431.2[机械工程—光学工程]