Controllable cold atom beam splitter based on parallel current-carrying wires and bias magnetic field

Abstract

Abstract:

A novel controllable cold neutral atom guiding scheme based on parallel current-carrying wires and bias magnetic field is proposed. Magnetic field distribution in cross-section at different transverse bias field is calculated. The centre of magnetic traps is discussed. Single-channel and double-channel magnetic guiding can be realized. Based on this scheme, an atom beam splitter, which has adjustable splitting ratio, is designed by adding a longitudinal magnetic bias field . The transverse distribution of magnetic trap is calculated, and the magnetic contour plane of the splitter is shown. By using the classical Monte-Carlo method, the splitting process is simulated, and this scheme is validated by the simulation results. Splitting ratio between left guide and right guide changes from 0.9/0.1 to 0.1/0.9 when longitudinal magnetic bias field changes from -0.005G to 0.005G.

Key words: atomic optics, splitter of cold atoms, Monte-Carlo simulation, splitting ratio

CLC Number:

SHEN Xing-Mao, WU Ming-Yan, LIU Na-Chun. Controllable cold atom beam splitter based on parallel current-carrying wires and bias magnetic field[J]. J4, 2011, 28(1): 37-43.

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