Quantum gas microscopy of three-dimensional systems

Imaging of quantum gases in optical lattices with single-site resolution has provided new ways to study quantum many-body systems. However, such microscopy was mainly restricted to two-dimensional systems. Here we present a new microscopy method, which overcomes the limitations of depth of focus and of parity projection and allows imaging three-dimensional systems with single lattice site resolution and we apply it to Bosons in an array of tubes, i.e. a Josephson junction array. We demonstrate the great potential of the new method for investigating diverse directions in lattice physics.