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arXiv · 1810.01434

Microwave preparation of two-dimensional fermionic spin mixtures

B. Peaudecerf·M. Andia·M. Brown·E. Haller·S. Kuhr
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Abstract

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.

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B. Peaudecerf, M. Andia, M. Brown, E. Haller, S. Kuhr. 2018-10-02. Microwave preparation of two-dimensional fermionic spin mixtures. https://doi.org/10.1088/1367-2630/aafb89

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