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arXiv · 1504.05250

Quantum gas microscopy with spin, atom-number and multi-layer readout

Philipp M. Preiss·Ruichao Ma·M. Eric Tai·Jonathan Simon·Markus Greiner
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Abstract

Atom- and site-resolved experiments with ultracold atoms in optical lattices provide a powerful platform for the simulation of strongly correlated materials. In this letter, we present a toolbox for the preparation, control and site-resolved detection of a tunnel-coupled bilayer degenerate quantum gas. Using a collisional blockade, we engineer occupation-dependent inter-plane transport which enables us to circumvent light-assisted pair loss during imaging and count n=0 to n=3 atoms per site. We obtain the first number- and site-resolved images of the Mott insulator "wedding cake" structure and observe the emergence of antiferromagnetic ordering across a magnetic quantum phase transition. We are further able to employ the bilayer system for spin-resolved readout of a mixture of two hyperfine states. This work opens the door to direct detection of entanglement and Kosterlitz-Thouless-type phase dynamics, as well as studies of coupled planar quantum materials.

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Philipp M. Preiss, Ruichao Ma, M. Eric Tai, Jonathan Simon, Markus Greiner. 2015-04-20. Quantum gas microscopy with spin, atom-number and multi-layer readout. https://doi.org/10.1103/physreva.91.041602

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