{"paper":{"title":"$\\Lambda$-enhanced gray-molasses loading and EIT cooling of neutral atoms in nanophotonic traps","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Lambda-enhanced gray-molasses loading increases trapped atoms sixfold and EIT cooling extends storage time fivefold in shallow nanophotonic traps.","cross_cats":["physics.optics","quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"Antoine Glicenstein, Arno Rauschenbeutel, J\\\"urgen Volz, Lucas Pache, Philipp Schneeweiss, Riccardo Pennetta","submitted_at":"2026-05-13T11:45:32Z","abstract_excerpt":"Nanophotonic traps for cold atoms typically have trap volumes that are orders of magnitude smaller than, e.g., free-space optical tweezers. This makes efficient loading of these traps challenging, thereby limiting the total number of atoms coupled to the nanophotonic waveguide. Here, we demonstrate that $\\Lambda$-enhanced gray-molasses ($\\Lambda$GM) can substantially increase the number of trapped atoms in a nanofiber-based cold-atom setup. Specifically, we observe a six-fold increase in the number of loaded atoms compared to conventional red-detuned polarization gradient cooling. Despite the "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"we observe a six-fold increase in the number of loaded atoms compared to conventional red-detuned polarization gradient cooling... EIT-assisted cooling that is found to increase the trap storage time to 400(9) ms. This is a 5-fold improvement over the passive storage time.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The measured atom number increase and lifetime extension are attributed solely to the LambdaGM and EIT methods without significant unaccounted changes in trap depth, background pressure, or probe-induced heating during the optical depth and lifetime measurements.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Lambda-enhanced gray-molasses loading yields a six-fold increase in trapped cesium atoms and EIT cooling extends storage time five-fold in nanophotonic nanofiber traps.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Lambda-enhanced gray-molasses loading increases trapped atoms sixfold and EIT cooling extends storage time fivefold in shallow nanophotonic traps.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"05875aad477a1a163e19757fe588e92c4beb8f6315a47c78c74c4539afba816f"},"source":{"id":"2605.13387","kind":"arxiv","version":1},"verdict":{"id":"c9041c2f-c11e-49aa-8f90-31fd93343451","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:45:31.518217Z","strongest_claim":"we observe a six-fold increase in the number of loaded atoms compared to conventional red-detuned polarization gradient cooling... EIT-assisted cooling that is found to increase the trap storage time to 400(9) ms. This is a 5-fold improvement over the passive storage time.","one_line_summary":"Lambda-enhanced gray-molasses loading yields a six-fold increase in trapped cesium atoms and EIT cooling extends storage time five-fold in nanophotonic nanofiber traps.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The measured atom number increase and lifetime extension are attributed solely to the LambdaGM and EIT methods without significant unaccounted changes in trap depth, background pressure, or probe-induced heating during the optical depth and lifetime measurements.","pith_extraction_headline":"Lambda-enhanced gray-molasses loading increases trapped atoms sixfold and EIT cooling extends storage time fivefold in shallow nanophotonic traps."},"references":{"count":55,"sample":[{"doi":"","year":2018,"title":"D. Chang, J. Douglas, A. Gonz´ alez-Tudela, C.-L. Hung, and H. Kimble, Reviews of Modern Physics90, 031002 (2018)","work_id":"c793c5d4-eba1-4408-871b-f14223323053","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"A. S. Sheremet, M. I. Petrov, I. V. Iorsh, A. V. Poshakin- skiy, and A. N. Poddubny, Reviews of Modern Physics 95, 015002 (2023)","work_id":"9a5ad02f-5d46-4b2a-99ef-f0c14aa32b9f","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1038/s42254-023-00681-1","year":2024,"title":"A. Gonz´ alez-Tudela, A. Reiserer, J. J. Garc´ ıa-Ripoll, and F. J. Garc´ ıa-Vidal, Nature Reviews Physics (2024), 10.1038/s42254-023-00681-1","work_id":"ac6d7529-0ae7-4044-986a-30159512cf08","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"W. Li, D. Brown, A. Vylegzhanin, Z. Shahrabifarahani, A. Raj, J. Du, and S. N. Chormaic, Journal of Physics: Photonics6, 021002 (2024)","work_id":"94c05992-e99c-43b0-a434-363f66ee9c23","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2017,"title":"P. Lodahl, S. Mahmoodian, S. Stobbe, A. Rauschenbeu- tel, P. Schneeweiss, J. Volz, H. Pichler, and P. Zoller, Nature541, 473 (2017)","work_id":"f4d9fa01-9038-4ba6-bd92-99f204aab6ab","ref_index":7,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":55,"snapshot_sha256":"f1783826d1ae41387731264df054d84ccd89ae9e6be4351239c57dfa36abab1f","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"1a748a79dbcbf3b8bb1bd0f147982935611e328fc60e99c8df9831741d84ab59"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}