Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum gases (Miscellaneous)

Q 49.5: Vortrag

Donnerstag, 12. März 2020, 15:15–15:30, e214

Quantum simulation of a U(1) lattice gauge theoryBing Yang1, •Robert Ott2, Hui Sun1, Han-Yi Wang1, Torsten V. Zache2, Jad C. Halimeh3,4, Zhen-Sheng Yuan1, Philipp Hauke3,4, and Jian-Wei Pan11Im Neuenheimer Feld 226, 69120 Heidelberg — 2Philosophenweg 16, 69120 Heidelberg — 3Im Neuenheimer Feld 227, 69120 Heidelberg — 4Via Sommarive 14, 38123 Povo (TN), Italy

The modern description of elementary particles is built on gauge theories. Such theories implement fundamental laws of physics by local constraints, such as Gauss's law in the interplay of charged matter and electromagnetic fields. Here, we demonstrate the quantum simulation of an extended U(1) lattice gauge theory, and experimentally quantify the faithfulness to Gauss's law. We use single-species bosonic atoms in alternating wells of a 71-site optical superlattice to realize charged matter and gauge fields, and experimentally benchmark the dynamics of their interaction by sweeping across a quantum phase transition. Enabled by new measurement techniques, we certify Gauss's law by extracting probabilities of locally gauge-invariant states from correlated boson occupations across three adjacent wells. Our results demonstrate that Gauss's law can be faithfully engineered in large-scale quantum simulators of gauge theories.

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