Year: 2024
Type: article
Abstract: The development of quantum-gas microscopes has brought novel ways of probing quantum degenerate many-body systems at the single-atom level. Until now, most of these setups have focused on alkali atoms. Expanding quantum-gas microscopy to alkaline-earth elements will provide new tools, such as SU( N )-symmetric fermionic isotopes or ultranarrow optical transitions, to the field of quantum simulation. Here we demonstrate the site-resolved imaging of a 84 Sr bosonic quantum gas in a Hubbard-regime optical lattice. The quantum gas is confined by a two-dimensional in-plane lattice and a light-sheet potential, which operate at the strontium clock-magic wavelength of 813.4 nm. We realize fluorescence imaging using the broad 461-nm transition, which provides high spatial resolution. Simultaneously, we perform attractive Sisyphus cooling with the narrow 689-nm intercombination line. We reconstruct the atomic occupation from the fluorescence images, obtaining imaging fidelities above 94 % . Finally, we realize a 84 Sr superfluid in the Bose-Hubbard regime. We observe its interference pattern upon expansion, a probe of phase coherence, with single-atom resolution. Our strontium quantum-gas microscope provides a new platform to study dissipative Hubbard models, quantum optics in atomic arrays, and SU( N ) fermions at the microscopic level. Published by the American Physical Society 2024
Source: PRX Quantum
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,450
Funders: Fundación Cellex, Centres de Recerca de Catalunya, Institut de Ciències Fotòniques, European Commission, Generalitat de Catalunya, Ministerio de Ciencia e Innovación, QuantERA, Agència de Gestió d'Ajuts Universitaris i de Recerca, Agencia Estatal de Investigación, European Social Fund, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions, NextGenerationEU
Awards: G1175115578, G1188902550, G120905174, G121809054, G1855990336, G1908469581, G193230900, Programmable Atomic Large-scale Quantum Simulation 2 - SGA1, G2064873908, G2066502545, G210041235, G2262748287, G2309174360, G2355262757, G2601397997, G2660406951, G2763573136, G279363373, G288263039, G3005324705, G300979063, G34346518, G3480869486, G3681454997, G3721475206, G4042783231, G4239348134, G425668148, G430777504, Unconventional Superfluids in Quantum Gases with Competing Interactions, G4856404060, G4920849106, G5080475149, G5195188938, G526456201, G5421974903, G546199279, G5548620101, ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics, G5805502524, G5845768719, G5852091828, G5987792135, ICFOstepstone PhD Programme for Early-Stage Researchers in Photonics, G6218905885, G6482940084, Disruptive Approaches to Atom-Light Interfaces, G6656126374, G69051668, G704744937, G7084143925, G7604509605, G773280237, G8004996335, G8180681537, G8546142835, G8598254347, G8637226926, G8665153912, G8888022036, G897484643, G99296377
OpenAlex ID: W4394911824