中国物理B ›› 2013, Vol. 22 ›› Issue (7): 74202-074202.doi: 10.1088/1674-1056/22/7/074202
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
唐慧琴a, 李绍新b, 朱开成a, 唐英a, 郑小娟a
Tang Hui-Qin (唐慧琴)a, Li Shao-Xin (李绍新)b, Zhu Kai-Cheng (朱开成)a, Tang Ying (唐英)a, Zheng Xiao-Juan (郑小娟)a
摘要: A scheme is proposed for preparing a quantum vortex state with a coupled waveguide, in which a single-mode odd cat state with weak intensity and a single-mode coherent state are inserted in the input ports, respectively. The analytical wavefunction of the resulting state in the quadrature space is derived, and the vortex structure of output state is analyzed. It is found that the obtained states, which may carry a vortex with topological charge index one, are entangled and nonclassical, depending only on the scaled propagation time and the weak intensity of the input odd cat state instead of the displacement parameter of the input coherent state. The phase distribution, however, in the quadrature space, depends on the displacement parameter of the input coherent state.
中图分类号: (Quantum optics)