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Controllable four-well optical trap for cold atoms or molecules

Yin Jian-Ping Lu Jun-Fa Ji Xian-Ming

Controllable four-well optical trap for cold atoms or molecules

Yin Jian-Ping, Lu Jun-Fa, Ji Xian-Ming
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  • Abstract views:  4008
  • PDF Downloads:  1360
  • Cited By: 0
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  • Received Date:  03 August 2005
  • Accepted Date:  30 November 2005
  • Published Online:  20 April 2006

Controllable four-well optical trap for cold atoms or molecules

  • 1. (1)华东师范大学物理系,光谱学与波谱学教育部重点实验室,上海 200062; (2)华东师范大学物理系,光谱学与波谱学教育部重点实验室,上海 200062;东华理工学院物理系,抚州 344000; (3)华东师范大学物理系,光谱学与波谱学教育部重点实验室,上海 200062;南通大学物理系,南通 226007

Abstract: In this paper, we propose a novel scheme to build a controllable four-well optical trap for cold atoms or molecules by using an optical system of a binary π-phase plate and a lens illuminated by a plane light wave. We calculate the intensity distribution of the four-well optical trap, and discuss the evolution process of the optical trap from four wells to two wells or form four wells to a single well, and derive some analytical relations between the characteristic parameters of the four-well trap (including geometric parameters, intensity distribution, intensity gradients and their curvatures) and the parameters of the optical lens system. Our study shows that our four-well trap can be continuously changed into a double-well one or a single-well one by moving the π-phase plate, and the relation between the distance of the trapping centers of the four wells or two wells and the moving distance of the π-phase plate is obtained by data fitting. So our four-well trap scheme has important and wide potential aplications in the fields of ultracold atomic physics, cold molecular physics, atom optics, molecule optics and quantum optics,and even in the fields of quantum calculation and information processing, and so on.

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