Year: 2023
Type: preprint
Abstract: Quantum link models (QLMs) offer the realistic prospect for the practical implementation of lattice quantum electrodynamics (QED) on modern quantum simulators, and they provide a venue for exploring various nonergodic phenomena relevant to quantum many-body physics. In these models, gauge and electric fields are represented by spin-$S$ operators. So far, large-scale realizations of QLMs have been restricted to $S=1/2$ representations, whereas the lattice-QED limit is approached at $S\to\infty$. Here, we present a bosonic mapping for the representation of gauge and electric fields with effective spin-$S$ operators for arbitrarily large values of $S$. Based on this mapping, we then propose an experimental scheme for the realization of a large-scale spin-$1$ $\mathrm{U}(1)$ QLM using spinless bosons in an optical superlattice. Using perturbation theory and infinite matrix product state calculations, which work directly in the thermodynamic limit, we demonstrate the faithfulness of the mapping and stability of gauge invariance throughout all accessible evolution times. We further demonstrate the potential of our proposed quantum simulator to address relevant high-energy physics by probing the (de)confinement of an electron--positron pair by tuning the gauge coupling. Our work provides an essential step towards gauge-theory quantum simulators in the quantum-field-theory limit.
Source: arXiv (Cornell University)
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: European Commission, Deutsche Forschungsgemeinschaft, National Natural Science Foundation of China, Fondazione Bruno Kessler, Università degli Studi di Trento, Provincia Autonoma di Trento, QuantERA, European Climate, Infrastructure and Environment Executive Agency, HORIZON EUROPE Framework Programme, Australian Research Council, Nuclear Physics, H2020 European Research Council
Awards: Simulating ultracold correlated quantum matter: New microscopic paradigms, G1171162939, G1377087751, NExt level Quantum information processing for Science and Technology, G1768993395, G2347902168, Quantum thermodynamics of ultra-cold atoms, Eine neue Generation von Quantensimulatoren: von dynamischen Eichfeldern zu Gittereichtheorien, G3879787133, G3939048584, G434337789, G4359800586, G5063675077, G575169067, QuantERA II ERA-NET Cofund in Quantum Technologies, Quantum-Inspired Machine Learning, EXC 2111: Munich Center for Quantum Science and Technology (MCQST)
OpenAlex ID: W4376311872