Archimedean-Spiral-Based Microchip Ring Waveguide for Cold Atoms
JIANG Xiao-Jun1,2 , LI Xiao-Lin1 , XU Xin-Ping1 , ZHANG Hai-Chao1 , WANG Yu-Zhu1
1 Key Laboratory for Quantum Optics and Center for Cold Atom Physics of Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002 University of Chinese Academy of Sciences, Beijing 100049
Abstract ：We present a scheme for generating a ring magnetic waveguide on a single-layer atom chip. The wire layout consists of two interleaved Archimedean spirals of the same size. The waveguide avoids the trapping perturbation caused by the input and output ports, resulting in an enclosed guiding loop for neutral atoms in weak-field seeking states. Such a configuration can create a tight and deep trap potential with a small current. Taking the |F =2,mF =2> state of 87 Rb as an example, the trap frequency and depth are estimated to be 18 kHz and 335 μK, respectively, with a dc current of 2 A.
出版日期: 2015-01-20
:
03.75.Dg
(Atom and neutron interferometry)
37.25.+k
(Atom interferometry techniques)
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2015, Vol. 32 
