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Koepsell, Joannis; Hirthe, Sarah; Bourgund, Dominik; Sompet, Pimonpan; Vijayan, Jayadev; Salomon, Guillaume; Gross, Christian; Bloch, Immanuel (2020): Robust Bilayer Charge Pumping for Spin- and Density-Resolved Quantum Gas Microscopy. In: Physical Review Letters, Vol. 125, No. 1, 010403
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Quantum gas microscopy has emerged as a powerful new way to probe quantum many-body systems at the microscopic level. However, layered or efficient spin-resolved readout methods have remained scarce as they impose strong demands on the specific atomic species and constrain the simulated lattice geometry and size. Here we present a novel high-fidelity bilayer readout, which can be used for full spin- and density-resolved quantum gas microscopy of two-dimensional systems with arbitrary geometry. Our technique makes use of an initial Stern-Gerlach splitting into adjacent layers of a highly stable vertical superlattice and subsequent charge pumping to separate the layers by 21 mu m. This separation enables independent high-resolution images of each layer. We benchmark our method by spin- and density-resolving two-dimensional Fermi-Hubbard systems. Our technique furthermore enables the access to advanced entropy engineering schemes, spectroscopic methods, or the realization of tunable bilayer systems.