A scalable realization of local U(1) gauge invariance in cold atomic mixtures

Year: 2020

Authors: Mil A., Zache TV., Hegde A., Xia A., Bhatt RP., Oberthaler MK., Hauke P., Berges J., Jendrzejewski F.

Autors Affiliation: Heidelberg Univ, Kirchhoff Inst Phys, Neuenheimer Feld 227, D-69120 Heidelberg, Germany; Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Trento, Italy; Univ Trento, Dept Phys, Via Sommar 14, I-38123 Trento, Italy.

Abstract: In the fundamental laws of physics, gauge fields mediate the interaction between charged particles. An example is the quantum theory of electrons interacting with the electromagnetic field, based on U(1) gauge symmetry. Solving such gauge theories is in general a hard problem for classical computational techniques. Although quantum computers suggest a way forward, large-scale digital quantum devices for complex simulations are difficult to build. We propose a scalable analog quantum simulator of a U(1) gauge theory in one spatial dimension. Using interspecies spin-changing collisions in an atomic mixture, we achieve gauge-invariant interactions between matter and gauge fields with spin- and species-independent trapping potentials. We experimentally realize the elementary building block as a key step toward a platform for quantum simulations of continuous gauge theories.

Journal/Review: SCIENCE

Volume: 367 (6482)      Pages from: 1128  to: +

More Information: We acknowledge funding from the DFG Collaborative Research Centre SFB 1225 (ISOQUANT), the ERC Advanced Grant EntangleGen (Project-ID 694561), the ERC Starting Grant StrEnQTh (Project-ID 804305), and the Excellence Initiative of the German federal government and the state governments funding line Institutional Strategy (Zukunftskonzept): DFG project number ZUK 49/U. F.J. acknowledges the DFG support through the project FOR 2724, the Emmy-Noether grant (project-id 377616843 ) and from the Juniorprofessorenprogramm Baden-Wurttemberg (MWK). P.H. acknowledges support by Provincia Autonoma di Trento, Quantum Science and Technology in Trento.
KeyWords: Quantum Simulation; Dynamics; Models; Gases
DOI: 10.1126/science.aaz5312

Citations: 157
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