Demonstration of a cold atom beam splitter on atom chip

Jiang Xiaojun^{1, 2}, Li Xiaolin¹, Zhang Haichao^{1, †,}, Wang Yuzhu^{1, ‡,}

Contour plots of the magnetic field in the xz plane for different currents of the U-wire, where the external bias field B_y is 50 Gs (1 Gs=10⁻⁴ T) and the current of the Z-wire I_Z is 2 A. The Z-trap (a) can deform into three traps after switching on the current of the U-wire. Panels (b) and (c) are corresponding to I_U = 1 A and I_U = 2 A.