Microwave preparation of two-dimensional fermionic spin mixtures

B Peaudecerf, M Andia, M Brown, E Haller, S Kuhr

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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.
Original languageEnglish
Article number013020
Number of pages10
JournalNew Journal of Physics
Early online date2 Jan 2019
Publication statusPublished - 25 Jan 2019


  • ultracold atoms
  • quantum gases
  • quantum simulation
  • optical lattices


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