{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["006:55"], "contactPoint": {"fn": "Noah Schlossberger", "hasEmail": "mailto:noah.schlossberger@nist.gov"}, "description": "We investigate the role of magnetic sublevels in Autler\u2013Townes spectra of Rydberg atoms driven by radio-frequency (RF) fields with arbitrary polarization. While conventional treatments predict two symmetric sidebands from independent $m_J$ transitions, experiments have reported additional unexplained spectral features. We show that these arise from elliptical RF polarization, which coherently couples multiple magnetic sublevels and requires a full multi-level treatment.\nWe develop and diagonalize a Hamiltonian including all coupled m_J sublevels, predicting polarization-dependent degeneracies that produce two, three, or four resolved peaks. Using long-wavelength transitions and an anechoic environment we realize homogeneous RF fields that for the first time enable complete resolution of the m_J-dependent dressed states. We observe excellent agreement with theory as the RF ellipticity is varied.\nThese results demonstrate that RF polarization fundamentally modifies Autler\u2013Townes spectra and provide a consistent framework for interpreting magnetic-sublevel structure, with implications for Rydberg-based RF electrometry and polarimetry.", "distribution": [{"downloadURL": "https://data.nist.gov/od/ds/mds2-4157/4157_README.txt", "mediaType": "text/plain", "title": "readme"}, {"downloadURL": "https://data.nist.gov/od/ds/mds2-4157/Fig2.csv", "mediaType": "text/csv", "title": "Figure 2"}, {"downloadURL": "https://data.nist.gov/od/ds/mds2-4157/Fig3.csv", "mediaType": "text/csv", "title": "Figure 3"}, {"downloadURL": "https://data.nist.gov/od/ds/mds2-4157/Fig4.csv", "mediaType": "text/csv", "title": "Figure 4"}, {"downloadURL": "https://data.nist.gov/od/ds/mds2-4157/Fig5.csv", "mediaType": "text/csv", "title": "Figure 5"}], "identifier": "ark:/88434/mds2-4157", "issued": "2026-07-23", "keyword": ["Rydberg atoms", "atomic physics", "electric field", "fields strength", "receivers", "volts/meter"], "landingPage": "https://data.nist.gov/od/id/mds2-4157", "language": ["en"], "license": "https://www.nist.gov/open/license", "modified": "2026-04-13 00:00:00", "programCode": ["006:045"], "publisher": {"@type": "org:Organization", "name": "National Institute of Standards and Technology"}, "theme": ["Physics:Atomic, molecular, and quantum", "Physics:Spectroscopy"], "title": "Data associated with \"Resolving magnetic-sublevel structure in Rydberg Autler-Townes spectra with arbitrary RF polarization\""}