Preparing quantum vortex states with odd Schrödinger cat states through a coupled waveguide system

doi:10.1088/1674-1056/22/7/074202

Abstract 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.

Keywords: odd Schrödinger cat state quantum vortex state coupled waveguide

Received: 04 October 2012
Revised: 08 November 2012
Accepted manuscript online:

PACS:	42.50.-p	(Quantum optics)
	42.50.Ar
	42.50.Dv	(Quantum state engineering and measurements)
	03.65.-w	(Quantum mechanics)

Corresponding Authors: Zhu Kai-Cheng
E-mail: KCZhu058@csu.edu.cn

Cite this article:

Tang Hui-Qin (唐慧琴), Li Shao-Xin (李绍新), Zhu Kai-Cheng (朱开成), Tang Ying (唐英), Zheng Xiao-Juan (郑小娟) Preparing quantum vortex states with odd Schrödinger cat states through a coupled waveguide system 2013 Chin. Phys. B 22 074202

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Preparing quantum vortex states with odd Schrödinger cat states through a coupled waveguide system

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