Microwave preparation of two-dimensional fermionic spin mixtures
Microwave preparation of two-dimensional fermionic spin mixtures
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DOI：
10.1088/1367-2630/aafb89
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发表时间：
2018-10
影响因子：
3.3
通讯作者：
B. Peaudecerf;Manuel Andia;M. Brown;E. Haller;Stefan Kuhr
中科院分区：
文献类型：
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作者：
B. Peaudecerf;Manuel Andia;M. Brown;E. Haller;Stefan Kuhr
我们提出了一种方法，用于制备一个单一的二维样品的两个自旋混合物的费米钾在一个单一的光晶格的腹，在量子气体显微镜装置。我们的技术依赖于磁场梯度中的空间选择性微波跃迁。绝热转移脉冲进行了优化，以获得高效率和最小的原子损失和加热，由于自旋改变碰撞。我们已经测量了这些损失过程的动力学，这在自旋混合物的存在下更加明显。由于在单个波腹中有效制备原子需要均匀的横向磁场，我们开发了一种方法来成像并最小化显微镜焦平面中的磁场梯度。
We present a method for preparing a single two-dimensional sample of a two-spin mixture of fermionic potassium in a single antinode of an optical lattice, in a quantum-gas microscope apparatus. Our technique relies on spatially-selective microwave transitions in a magnetic field gradient. Adiabatic transfer pulses were optimized for high efficiency and minimal atom loss and heating due to spin-changing collisions. We have measured the dynamics of those loss processes, which are more pronounced in the presence of a spin mixture. As the efficient preparation of atoms in a single antinode requires a homogeneous transverse magnetic field, we developed a method to image and minimize the magnetic field gradients in the focal plane of the microscope.