Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session H02: Frontiers of Quantum Simulations  Revealing Hidden Symmetries and Novel ExcitationsInvited Live Streamed

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Chair: Jacob Covey, UIUC Room: Grand Ballroom A 
Wednesday, June 1, 2022 8:00AM  8:30AM 
H02.00001: When the complex nature of atoms can really make a difference: ultracold erbium and dysprosium for quantum simulation Invited Speaker: Francesca Ferlaino Since its creation, the field of ultracold atoms has been through fantastic developments. Some of the most recent include the development of quantumgas microscopes, atom tweezers, and various forms of interaction engineering. Each of these experimental advances has allowed new quantum phenomena to be accessed and observed. A further important development is based on the use of more exotic atomic species, whose peculiar atomic properties have allowed to broaden the horizons of investigation. 
Wednesday, June 1, 2022 8:30AM  9:00AM 
H02.00002: Quantum simulation of FermiHubbard dynamics and bosonic Laughlin states Invited Speaker: Markus Greiner Quantum simulations with ultracold atoms in optical lattices expand into new regimes with ample room for discovery. I will present work that investigates the intricate interplay between spin and charge in the FermiHubbard model, and that gives evidence for magnetic polarons, whose dynamics may explain emergent properties of quantum materials such as hightemperature superconductivity. We directly observe the formation dynamics and subsequent spreading of individual magnetic polarons, enabling the study of outofequilibrium emergent phenomena in the FermiHubbard model, one dopant at a time. In our bosonic work we realize strongly correlated topological states of matter and find evidence for a twoparticle fractional quantum Hall state following a bottomup approach. 
Wednesday, June 1, 2022 9:00AM  9:30AM 
H02.00003: Strongly correlated matter with ultracold atoms: From the Hubbard model to Z_{2} lattice gauge theory Invited Speaker: Fabian Grusdt Ultracold atoms in optical potentials have made great progress over the past few years, and provide the most promising platform for quantum simulations of strongly correlated quantum matter. Indeed, these platforms have already begun to study some of the most challenging open problems in theoretical physics, including the search for the origin of hightemperature superconductivity in the FermiHubbard model and the realization of quantum spin liquids hosting nontrivial topological excitations. I will start this talk by giving a brief overview how far the quantum simulation of the doped FermiHubbard model has already come. Then I will explain how such doped quantum magnets can, in some instances, be directly mapped to Z_{2} lattice gauge theories with dynamical matter. On the one hand this allows for an elegant description of hidden string order in these systems and lends a natural explanation to stripe phases. On the other hand, it motivates the search for mesontype excitations  a hallmark feature of lattice gauge theories  in a larger class of doped quantum magnets. I will present recent numerical results pointing to a rich emergent structure of charge carriers in strongly correlated quantum materials, and discuss how these theoretical predictions can result in direct experimental verifications using ultracold atoms. I will close the talk with an outlook how a paradigmatic Z_{2} lattice gauge theory with dynamical matter can be realized with current technology in 2D Rydberg arrays. 
Wednesday, June 1, 2022 9:30AM  10:00AM 
H02.00004: Observing the emergence of many body physics, atom by atom Invited Speaker: Selim Jochim We prepare samples of up to 20 fermionic atoms with ultralow entropies in a twodimensional configuration. We developed a single atom and spin sensitive imaging technique that allows us to detect all atoms of a samlpe either in real, or in momentum space. From such measurements we can infer correlations in the system. In our fermonic system, these are present already in a noninteracting sample and give rise to socalled Pauli Crystals [1]. More interesting correlations arise as soon as interactions in the system are turned on. Now, Cooper pairs and a BCSlike system can be observed to form with p,p  correlations emerging at the Fermi surface [3]. In our trapped finite system, pairing occurs only at a finite attraction strength, which results in the precursor of a quantum phase transition [2]. To further understand the emergence of many body physics from the fewbody limit we are currently exploring a single impurity in a finite Fermi sea to observe the transition from a molecular to a polaronic state. We will present progress on our quest to understand the polaron from the correlations between its constituents. 
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