Microwave preparation of two-dimensional fermionic spin mixtures. (25th January 2019)

• Record Type: Journal Article
• Authors: Peaudecerf, B; Andia, M; Brown, M; Haller, E; Kuhr, S
• Is Part Of: New journal of physics. Volume 21:Number 1(2019:Jan.)
• Publication Date: 2019-01-25
• Subjects: ultracold atoms -- quantum gases -- quantum simulation -- optical lattices; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aafb89
• Languages: English
• ISSNs: 1367-2630

Abstract

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.