{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:364XCOCQZEDULY4SLZ2QJXRJYL","short_pith_number":"pith:364XCOCQ","schema_version":"1.0","canonical_sha256":"dfb9713850c90745e3925e7504de29c2c997f6d81a9c67882f5a6fce0a1c64e4","source":{"kind":"arxiv","id":"1911.04406","version":2},"attestation_state":"computed","paper":{"title":"Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph","physics.optics"],"primary_cat":"quant-ph","authors_text":"David Grass, Kahan Dare, Manuel Reisenbauer, Markus Aspelmeyer, Nikolai Kiesel, Uro\\v{s} Deli\\'c, Vladan Vuleti\\'c","submitted_at":"2019-11-11T17:26:28Z","abstract_excerpt":"We report quantum ground state cooling of a levitated nanoparticle in a room temperature environment. Using coherent scattering into an optical cavity we cool the center of mass motion of a $143$ nm diameter silica particle by more than $7$ orders of magnitude to $n_x=0.43\\pm0.03$ phonons along the cavity axis, corresponding to a temperature of $12~\\mu$K. We infer a heating rate of $\\Gamma_x/2\\pi = 21\\pm 3$ kHz, which results in a coherence time of $7.6~\\mu$s -- or $15$ coherent oscillations -- while the particle is optically trapped at a pressure of $10^{-6}$ mbar. The inferred optomechanical"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1911.04406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-11-11T17:26:28Z","cross_cats_sorted":["physics.atom-ph","physics.optics"],"title_canon_sha256":"5f353d1ebf5d077e0a8a8f50323abd3909bbabd28322e1026aae9cb6a579ba1d","abstract_canon_sha256":"8c3276d2cab125ab60ffbfdf35e0b5182564242ac9fdc8c815a792eb7c47de6f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:44:18.809652Z","signature_b64":"jAb8Lm5zySf7JsL41tlFhaq5Dg6Zjj+54bFV/RZymP7C++h0jNfPElh5rP5oeOEcOYYHe0E7nZaHRe89+0b0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dfb9713850c90745e3925e7504de29c2c997f6d81a9c67882f5a6fce0a1c64e4","last_reissued_at":"2026-07-05T00:44:18.809143Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:44:18.809143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph","physics.optics"],"primary_cat":"quant-ph","authors_text":"David Grass, Kahan Dare, Manuel Reisenbauer, Markus Aspelmeyer, Nikolai Kiesel, Uro\\v{s} Deli\\'c, Vladan Vuleti\\'c","submitted_at":"2019-11-11T17:26:28Z","abstract_excerpt":"We report quantum ground state cooling of a levitated nanoparticle in a room temperature environment. Using coherent scattering into an optical cavity we cool the center of mass motion of a $143$ nm diameter silica particle by more than $7$ orders of magnitude to $n_x=0.43\\pm0.03$ phonons along the cavity axis, corresponding to a temperature of $12~\\mu$K. We infer a heating rate of $\\Gamma_x/2\\pi = 21\\pm 3$ kHz, which results in a coherence time of $7.6~\\mu$s -- or $15$ coherent oscillations -- while the particle is optically trapped at a pressure of $10^{-6}$ mbar. The inferred optomechanical"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.04406","kind":"arxiv","version":2},"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/1911.04406/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1911.04406","created_at":"2026-07-05T00:44:18.809204+00:00"},{"alias_kind":"arxiv_version","alias_value":"1911.04406v2","created_at":"2026-07-05T00:44:18.809204+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.04406","created_at":"2026-07-05T00:44:18.809204+00:00"},{"alias_kind":"pith_short_12","alias_value":"364XCOCQZEDU","created_at":"2026-07-05T00:44:18.809204+00:00"},{"alias_kind":"pith_short_16","alias_value":"364XCOCQZEDULY4S","created_at":"2026-07-05T00:44:18.809204+00:00"},{"alias_kind":"pith_short_8","alias_value":"364XCOCQ","created_at":"2026-07-05T00:44:18.809204+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL","json":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL.json","graph_json":"https://pith.science/api/pith-number/364XCOCQZEDULY4SLZ2QJXRJYL/graph.json","events_json":"https://pith.science/api/pith-number/364XCOCQZEDULY4SLZ2QJXRJYL/events.json","paper":"https://pith.science/paper/364XCOCQ"},"agent_actions":{"view_html":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL","download_json":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL.json","view_paper":"https://pith.science/paper/364XCOCQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1911.04406&json=true","fetch_graph":"https://pith.science/api/pith-number/364XCOCQZEDULY4SLZ2QJXRJYL/graph.json","fetch_events":"https://pith.science/api/pith-number/364XCOCQZEDULY4SLZ2QJXRJYL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL/action/storage_attestation","attest_author":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL/action/author_attestation","sign_citation":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL/action/citation_signature","submit_replication":"https://pith.science/pith/364XCOCQZEDULY4SLZ2QJXRJYL/action/replication_record"}},"created_at":"2026-07-05T00:44:18.809204+00:00","updated_at":"2026-07-05T00:44:18.809204+00:00"}