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Cold-atom quantum simulators of gauge theories (2310.12201v1)

Published 18 Oct 2023 in cond-mat.quant-gas, cond-mat.stat-mech, cond-mat.str-el, hep-lat, and quant-ph

Abstract: Gauge theories represent a fundamental framework underlying modern physics, constituting the basis of the Standard Model and also providing useful descriptions of various phenomena in condensed matter. Realizing gauge theories on accessible and tunable tabletop quantum devices offers the possibility to study their dynamics from first principles time evolution and to probe their exotic physics, including that generated by deviations from gauge invariance, which is not possible, e.g., in dedicated particle colliders. Not only do cold-atom quantum simulators hold the potential to provide new insights into outstanding high-energy and nuclear-physics questions, they also provide a versatile tool for the exploration of topological phases and ergodicity-breaking mechanisms relevant to low-energy many-body physics. In recent years, cold-atom quantum simulators have demonstrated impressive progress in the large-scale implementation of $1+1$D Abelian gauge theories. In this Review, we chronicle the progress of cold-atom quantum simulators of gauge theories, highlighting the crucial advancements achieved along the way in order to reliably stabilize gauge invariance and go from building blocks to large-scale realizations where \textit{bona fide} gauge-theory phenomena can be probed. We also provide a brief outlook on where this field is heading, and what is required experimentally and theoretically to bring the technology to the next level by surveying various concrete proposals for advancing these setups to higher spatial dimensions, higher-spin representations of the gauge field, and non-Abelian gauge groups.

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