{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:GN632E5ZRZAEDMVUFS3ZFK6MCU","short_pith_number":"pith:GN632E5Z","canonical_record":{"source":{"id":"1608.00802","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-02T13:11:36Z","cross_cats_sorted":[],"title_canon_sha256":"a48452c1104dad6699f1ed7b09a91e9f6370b01061d9870ff02c0eb6f3c85dee","abstract_canon_sha256":"f1bb0152f3056196567327aac25bd4c37476b2805f8aaa1613725e382cb3e26f"},"schema_version":"1.0"},"canonical_sha256":"337dbd13b98e4041b2b42cb792abcc151c3b8f749e99b8cff1b8540dc5c2256b","source":{"kind":"arxiv","id":"1608.00802","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.00802","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"arxiv_version","alias_value":"1608.00802v2","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.00802","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"pith_short_12","alias_value":"GN632E5ZRZAE","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GN632E5ZRZAEDMVU","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GN632E5Z","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:GN632E5ZRZAEDMVUFS3ZFK6MCU","target":"record","payload":{"canonical_record":{"source":{"id":"1608.00802","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-02T13:11:36Z","cross_cats_sorted":[],"title_canon_sha256":"a48452c1104dad6699f1ed7b09a91e9f6370b01061d9870ff02c0eb6f3c85dee","abstract_canon_sha256":"f1bb0152f3056196567327aac25bd4c37476b2805f8aaa1613725e382cb3e26f"},"schema_version":"1.0"},"canonical_sha256":"337dbd13b98e4041b2b42cb792abcc151c3b8f749e99b8cff1b8540dc5c2256b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:40.119553Z","signature_b64":"u7hXIXz2c/qaALOYVXLVWBrVTp90agvyIPthP+uXyjDb23GwQr9kVPspYBlUFrwGUjqP/3SJq0PJo9tBzOweBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"337dbd13b98e4041b2b42cb792abcc151c3b8f749e99b8cff1b8540dc5c2256b","last_reissued_at":"2026-05-18T00:53:40.119092Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:40.119092Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.00802","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:53:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZIO3a35YiUDchb+puCFdzAhlo3fqjjniyqhL+qcg3bCpwTYoyjyp3JOajrBjxcravb1t9fStOvlz2ihg1fxiBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:18:24.969377Z"},"content_sha256":"eb620edc24ce78316e70c304a82b6812ced7f73840016e6eb2223da6a5016580","schema_version":"1.0","event_id":"sha256:eb620edc24ce78316e70c304a82b6812ced7f73840016e6eb2223da6a5016580"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:GN632E5ZRZAEDMVUFS3ZFK6MCU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological particle-in-cell simulations with ultralight axion dark matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jan Veltmaat, Jens C. Niemeyer","submitted_at":"2016-08-02T13:11:36Z","abstract_excerpt":"We study cosmological structure formation with ultralight axion dark matter, or \"fuzzy dark matter (FDM), using a particle-mesh scheme to account for the quantum pressure arising in the Madelung formulation of the Schr\\\"odinger-Poisson equations. Subpercent-level energy conservation and correct linear behavior are demonstrated. Whereas the code gives rise to the same core-halo profiles as direct simulations of the Schr\\\"odinger equation, it does not reproduce the detailed interference patterns. In cosmological simulations with FDM initial conditions, we find a maximum relative difference of O("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.00802","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":""},"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":"2026-05-18T00:53:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oSZ4T4GoQTfK56fwxZSecg0iKmtTzJj4rRW8Tzrts8oOrGMsFgLcfevS6UiTqktPei4U698vQHs/JuAEqjVDDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:18:24.969728Z"},"content_sha256":"4445ebeb993cd27b945e7dfaa0ec962f4ebde1af5e8b8157fb97377bc950be1a","schema_version":"1.0","event_id":"sha256:4445ebeb993cd27b945e7dfaa0ec962f4ebde1af5e8b8157fb97377bc950be1a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/bundle.json","state_url":"https://pith.science/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/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":"2026-06-11T14:18:24Z","links":{"resolver":"https://pith.science/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU","bundle":"https://pith.science/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/bundle.json","state":"https://pith.science/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GN632E5ZRZAEDMVUFS3ZFK6MCU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GN632E5ZRZAEDMVUFS3ZFK6MCU","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":"f1bb0152f3056196567327aac25bd4c37476b2805f8aaa1613725e382cb3e26f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-02T13:11:36Z","title_canon_sha256":"a48452c1104dad6699f1ed7b09a91e9f6370b01061d9870ff02c0eb6f3c85dee"},"schema_version":"1.0","source":{"id":"1608.00802","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.00802","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"arxiv_version","alias_value":"1608.00802v2","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.00802","created_at":"2026-05-18T00:53:40Z"},{"alias_kind":"pith_short_12","alias_value":"GN632E5ZRZAE","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GN632E5ZRZAEDMVU","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GN632E5Z","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:4445ebeb993cd27b945e7dfaa0ec962f4ebde1af5e8b8157fb97377bc950be1a","target":"graph","created_at":"2026-05-18T00:53:40Z","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 study cosmological structure formation with ultralight axion dark matter, or \"fuzzy dark matter (FDM), using a particle-mesh scheme to account for the quantum pressure arising in the Madelung formulation of the Schr\\\"odinger-Poisson equations. Subpercent-level energy conservation and correct linear behavior are demonstrated. Whereas the code gives rise to the same core-halo profiles as direct simulations of the Schr\\\"odinger equation, it does not reproduce the detailed interference patterns. In cosmological simulations with FDM initial conditions, we find a maximum relative difference of O(","authors_text":"Jan Veltmaat, Jens C. Niemeyer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-02T13:11:36Z","title":"Cosmological particle-in-cell simulations with ultralight axion dark matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.00802","kind":"arxiv","version":2},"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:eb620edc24ce78316e70c304a82b6812ced7f73840016e6eb2223da6a5016580","target":"record","created_at":"2026-05-18T00:53:40Z","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":"f1bb0152f3056196567327aac25bd4c37476b2805f8aaa1613725e382cb3e26f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-02T13:11:36Z","title_canon_sha256":"a48452c1104dad6699f1ed7b09a91e9f6370b01061d9870ff02c0eb6f3c85dee"},"schema_version":"1.0","source":{"id":"1608.00802","kind":"arxiv","version":2}},"canonical_sha256":"337dbd13b98e4041b2b42cb792abcc151c3b8f749e99b8cff1b8540dc5c2256b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"337dbd13b98e4041b2b42cb792abcc151c3b8f749e99b8cff1b8540dc5c2256b","first_computed_at":"2026-05-18T00:53:40.119092Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:40.119092Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u7hXIXz2c/qaALOYVXLVWBrVTp90agvyIPthP+uXyjDb23GwQr9kVPspYBlUFrwGUjqP/3SJq0PJo9tBzOweBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:40.119553Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.00802","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb620edc24ce78316e70c304a82b6812ced7f73840016e6eb2223da6a5016580","sha256:4445ebeb993cd27b945e7dfaa0ec962f4ebde1af5e8b8157fb97377bc950be1a"],"state_sha256":"ee79beb58e2c76c20b994bc6a9b50c75d21ad69aa607b5fcdc1ec9b629e018f4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wuO/cjM+5tL+hrfKUeLhmf7tXBPbjXeMyzYEX9RpD+BV0u4H9pAyfS5IC/k1OkiFCsoJk4Hhz6w7y+0CjofYBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T14:18:24.971654Z","bundle_sha256":"1d495db2fffb043a83561e6b9a7512efbe28d0f316acdfd86c99afd58f41287a"}}