{"paper":{"title":"Positronium laser cooling via the $1^3S$-$2^3P$ transition with a broadband laser pulse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.atom-ph","authors_text":"A. Camper, A. Linek, B. Bergmann, B. Rien\\\"acker, B. S. Rawat, C. P. Welsch, D. Comparat, D. Tefelski, F. Castelli, F. Guatieri, F. Gustafsson, F. Prelz, G. Consolati, G. Kasprowicz, G. Khatri, G. Kornakov, H. Sandaker, J. Malamant, J. Zielinski, \\L. Graczykowski, {\\L}.K{\\l}osowski, L. Lappo, L. Penasa, L. Povolo, L. T. Gl\\\"oggler, M. A. Janik, M. Auzins, M. Doser, M. Grosbart, M. Piwi\\'nski, M. Volponi, M. Zawada, N. Gusakova, N. Zurlo, O. M. R{\\o}hne, P. Burian, P. Smolyanskiy, R. Caravita, R. Ciury{\\l}o, R. S. Brusa, S. A. Rangwala, S. Haider, S. Huck, S. Mariazzi, S. Pospisil, T. Rauschendorfer, T. Sowi\\'nski, T. Vafeiadis, T. Wolz, V. Krumins, V. Petracek, V. Rodin","submitted_at":"2023-10-12T23:00:01Z","abstract_excerpt":"We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground state after the time Ps has spent in the long-lived $3^3P$ states. The second effect is the one-dimensional Doppler cooling of Ps, reducing the cloud's temperature from 380(20) K to 170(20) K. We demonstr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.08760","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2310.08760/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}