Microwave preparation of two-dimensional fermionic spin mixtures

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

Research output: Contribution to journalArticle

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.
LanguageEnglish
Article number013020
Number of pages10
JournalNew Journal of Physics
Volume21
Early online date2 Jan 2019
DOIs
Publication statusPublished - 25 Jan 2019

Fingerprint

antinodes
microwaves
preparation
microscopes
magnetic fields
gradients
atoms
potassium
heating
collisions
pulses
gases

Keywords

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

Cite this

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Microwave preparation of two-dimensional fermionic spin mixtures. / Peaudecerf, B; Andia, M; Brown, M; Haller, E; Kuhr, S.

In: New Journal of Physics, Vol. 21, 013020, 25.01.2019.

Research output: Contribution to journalArticle

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AU - Andia, M

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AU - Haller, E

AU - Kuhr, S

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AB - 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.

KW - ultracold atoms

KW - quantum gases

KW - quantum simulation

KW - optical lattices

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