{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:KVYL72VTULMGSB7ZELMO3LASAD","short_pith_number":"pith:KVYL72VT","canonical_record":{"source":{"id":"physics/0005035","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.atom-ph","submitted_at":"2000-05-14T21:41:41Z","cross_cats_sorted":[],"title_canon_sha256":"7bd4e746c0fff2406d4ded3a6d7baab0be9f4b7a55c68fe76832062f0e2c0776","abstract_canon_sha256":"42e8099588ae3d9622dcb587c78a2f3c1298611ef0d8c7378db0fc1703d9df65"},"schema_version":"1.0"},"canonical_sha256":"5570bfeab3a2d86907f922d8edac1200f4a1c1c1685f6c9f04fd98b25aefd81d","source":{"kind":"arxiv","id":"physics/0005035","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0005035","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0005035v1","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0005035","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"pith_short_12","alias_value":"KVYL72VTULMG","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"KVYL72VTULMGSB7Z","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"KVYL72VT","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:KVYL72VTULMGSB7ZELMO3LASAD","target":"record","payload":{"canonical_record":{"source":{"id":"physics/0005035","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.atom-ph","submitted_at":"2000-05-14T21:41:41Z","cross_cats_sorted":[],"title_canon_sha256":"7bd4e746c0fff2406d4ded3a6d7baab0be9f4b7a55c68fe76832062f0e2c0776","abstract_canon_sha256":"42e8099588ae3d9622dcb587c78a2f3c1298611ef0d8c7378db0fc1703d9df65"},"schema_version":"1.0"},"canonical_sha256":"5570bfeab3a2d86907f922d8edac1200f4a1c1c1685f6c9f04fd98b25aefd81d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:38:11.534640Z","signature_b64":"SAkySkSgjCs4mBut4Fn7t8ro/p+cP/g2wTPvOCPJlR6JYEyEta5L4MlIZmM04EV2JZjCNhnZLE7y08jPSKqdAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5570bfeab3a2d86907f922d8edac1200f4a1c1c1685f6c9f04fd98b25aefd81d","last_reissued_at":"2026-05-18T01:38:11.534041Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:38:11.534041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"physics/0005035","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:38:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DrAQy52mp4rAKUtigIc9RFZwGPu41C8ltRn71LnSiuZDyB3B9752IyIj12OffFJod/LbsTQqXXauRLo+lMBXCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T03:14:27.234237Z"},"content_sha256":"da5348b766ac1f90c5b13fa3757e970a45b3bee3c957dab854169b30240ccfc6","schema_version":"1.0","event_id":"sha256:da5348b766ac1f90c5b13fa3757e970a45b3bee3c957dab854169b30240ccfc6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:KVYL72VTULMGSB7ZELMO3LASAD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical and evaporative cooling of cesium atoms in the gravito-optical surface trap","license":"","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"D. Rychtarik, Germany), Heidelberg, I. Manek-H\\\"onninger, M. Hammes, R. Grimm (Max-Planck-Institut f\\\"ur Kernphysik, U. Moslener, V. Druzhinina","submitted_at":"2000-05-14T21:41:41Z","abstract_excerpt":"We report on cooling of an atomic cesium gas closely above an evanescent-wave atom mirror. At high densitities, optical cooling based on inelastic reflections is found to be limited by a density-dependent excess temperature and trap loss due to ultracold collisions involving repulsive molecular states. Nevertheless, very good starting conditions for subsequent evaporative cooling are obtained. Our first evaporation experiments show a temperature reduction from 10muK down to 300nK along with a gain in phase-space density of almost two orders of magnitude."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0005035","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:38:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rJOViHA7dkzBg94DvFjRQT9dHjji29GCO0Iacp56Zttm0ovBQx/Ugg0rs44lynuU9gMwk+I+0BMj2uGDZNgyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T03:14:27.234928Z"},"content_sha256":"3b4b3b199e1c92a001d3edd37327dc67f544b82d03457cc2f9a57d968dfa7285","schema_version":"1.0","event_id":"sha256:3b4b3b199e1c92a001d3edd37327dc67f544b82d03457cc2f9a57d968dfa7285"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KVYL72VTULMGSB7ZELMO3LASAD/bundle.json","state_url":"https://pith.science/pith/KVYL72VTULMGSB7ZELMO3LASAD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KVYL72VTULMGSB7ZELMO3LASAD/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T03:14:27Z","links":{"resolver":"https://pith.science/pith/KVYL72VTULMGSB7ZELMO3LASAD","bundle":"https://pith.science/pith/KVYL72VTULMGSB7ZELMO3LASAD/bundle.json","state":"https://pith.science/pith/KVYL72VTULMGSB7ZELMO3LASAD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KVYL72VTULMGSB7ZELMO3LASAD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:KVYL72VTULMGSB7ZELMO3LASAD","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"42e8099588ae3d9622dcb587c78a2f3c1298611ef0d8c7378db0fc1703d9df65","cross_cats_sorted":[],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2000-05-14T21:41:41Z","title_canon_sha256":"7bd4e746c0fff2406d4ded3a6d7baab0be9f4b7a55c68fe76832062f0e2c0776"},"schema_version":"1.0","source":{"id":"physics/0005035","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0005035","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0005035v1","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0005035","created_at":"2026-05-18T01:38:11Z"},{"alias_kind":"pith_short_12","alias_value":"KVYL72VTULMG","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"KVYL72VTULMGSB7Z","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"KVYL72VT","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:3b4b3b199e1c92a001d3edd37327dc67f544b82d03457cc2f9a57d968dfa7285","target":"graph","created_at":"2026-05-18T01:38:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report on cooling of an atomic cesium gas closely above an evanescent-wave atom mirror. At high densitities, optical cooling based on inelastic reflections is found to be limited by a density-dependent excess temperature and trap loss due to ultracold collisions involving repulsive molecular states. Nevertheless, very good starting conditions for subsequent evaporative cooling are obtained. Our first evaporation experiments show a temperature reduction from 10muK down to 300nK along with a gain in phase-space density of almost two orders of magnitude.","authors_text":"D. Rychtarik, Germany), Heidelberg, I. Manek-H\\\"onninger, M. Hammes, R. Grimm (Max-Planck-Institut f\\\"ur Kernphysik, U. Moslener, V. Druzhinina","cross_cats":[],"headline":"","license":"","primary_cat":"physics.atom-ph","submitted_at":"2000-05-14T21:41:41Z","title":"Optical and evaporative cooling of cesium atoms in the gravito-optical surface trap"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0005035","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:da5348b766ac1f90c5b13fa3757e970a45b3bee3c957dab854169b30240ccfc6","target":"record","created_at":"2026-05-18T01:38:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"42e8099588ae3d9622dcb587c78a2f3c1298611ef0d8c7378db0fc1703d9df65","cross_cats_sorted":[],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2000-05-14T21:41:41Z","title_canon_sha256":"7bd4e746c0fff2406d4ded3a6d7baab0be9f4b7a55c68fe76832062f0e2c0776"},"schema_version":"1.0","source":{"id":"physics/0005035","kind":"arxiv","version":1}},"canonical_sha256":"5570bfeab3a2d86907f922d8edac1200f4a1c1c1685f6c9f04fd98b25aefd81d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5570bfeab3a2d86907f922d8edac1200f4a1c1c1685f6c9f04fd98b25aefd81d","first_computed_at":"2026-05-18T01:38:11.534041Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:38:11.534041Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SAkySkSgjCs4mBut4Fn7t8ro/p+cP/g2wTPvOCPJlR6JYEyEta5L4MlIZmM04EV2JZjCNhnZLE7y08jPSKqdAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:38:11.534640Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0005035","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da5348b766ac1f90c5b13fa3757e970a45b3bee3c957dab854169b30240ccfc6","sha256:3b4b3b199e1c92a001d3edd37327dc67f544b82d03457cc2f9a57d968dfa7285"],"state_sha256":"7cebb9764c36038de8d548880e49a710b0cc6e7b422b1451c9dc67f64378f801"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cN08N7bD5N8IMz370MIQ95xKSPaip8g4w2SMOVL0VjnTZ//s0YmebwWcOfCZPPyWYn4Da6OoYwjABv3yPXpVCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T03:14:27.239111Z","bundle_sha256":"e73744dca2def5a893a269ab9d45eed5fb64dbaeb874c19d02e65502a4bb96d2"}}