Archimedean-Spiral-Based Microchip Ring Waveguide for Cold Atoms

我们在场为产生一枚戒指的一个计划一个单个层的原子薄片上的磁性的波导。电线布局由一样的尺寸的二根交叉阿基米得的螺线组成。波导避免输入和输出端口引起的套住的不安，导致为处于弱地的寻求的状态的中立原子的一个围住的指导的环。如此的一种配置能与小水流创造一个紧密、深的陷井潜力。拿 | F = 2， m 2 87=> Rb 作为一个例子，陷井频率和深度被估计分别地，与 2 A 的 dc 水流是 18 kHz 和 335 K。

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 87Rb as an example, the trap frequency and depth are estimated to be 18kHz and 335 μK, respectively, with adc current of 2 A.