SAMOP 2023 – wissenschaftliches Programm

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SYAD: Symposium SAMOP Dissertation Prize 2023

SYAD 1: SAMOP Dissertation Prize Symposium (SYAD)

SYAD 1.1: Hauptvortrag

Montag, 6. März 2023, 14:30–15:00, E415

Quantum gas magnifier for sub-lattice resolved imaging of 3D quantum systems — •Luca Asteria — Institut für Laserphysik, Hamburg University, Hamburg — The Hamburg Centre for Ultrafast Imaging, Hamburg

Ultracold atoms in optical lattices are promising platforms for studies of fundamental physics and quantum simulation of many body physics. An in-situ detection of the atomic density distribution within the lattice however is challenging due to diffraction limits within the optical detection.

Here we demonstrate a new detection technique, based on a magnification of the pure density distribution prior to the optical detection which allows large scale images of the lattice system with sub-lattice spacing resolution. The protocol is based on a T/4 evolution in a harmonic trap and subsequent time of flight which magnifies the initial atomic density distribution up to a factor of 90. We get thus an effective resolution as small as 80µm, which even allows the observation of the motion of the atoms within the lattice sites, a promising step towards the real-space study of systems with orbital degrees of freedom.

Furthermore, we demonstrate how similar matter wave protocols could be used to access spatial coherence properties at the microscopic range level. This paves the way for quantum simulations of new types of materials and various applications in quantum technologies.