{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:5BWVSZJ4TX36KBBMINHGMILGIT","short_pith_number":"pith:5BWVSZJ4","canonical_record":{"source":{"id":"1011.6669","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-30T20:37:34Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"86252d500da5f3b9769b4232a2e8252d5d03067c8ea90c5a9fadae29f4f245c2","abstract_canon_sha256":"5a60e2ae7a9a56af4846e06c11066d270006ac7339757d9a3891cc658363f3ae"},"schema_version":"1.0"},"canonical_sha256":"e86d59653c9df7e5042c434e66216644fc6781dc06a3eba241435fb2ed1ecf4d","source":{"kind":"arxiv","id":"1011.6669","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.6669","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"arxiv_version","alias_value":"1011.6669v3","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.6669","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"pith_short_12","alias_value":"5BWVSZJ4TX36","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5BWVSZJ4TX36KBBM","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5BWVSZJ4","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:5BWVSZJ4TX36KBBMINHGMILGIT","target":"record","payload":{"canonical_record":{"source":{"id":"1011.6669","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-30T20:37:34Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"86252d500da5f3b9769b4232a2e8252d5d03067c8ea90c5a9fadae29f4f245c2","abstract_canon_sha256":"5a60e2ae7a9a56af4846e06c11066d270006ac7339757d9a3891cc658363f3ae"},"schema_version":"1.0"},"canonical_sha256":"e86d59653c9df7e5042c434e66216644fc6781dc06a3eba241435fb2ed1ecf4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:23:17.060240Z","signature_b64":"5dOEzTjaVQHE0JrTJFqojdbh2zueqNkbD00A9JNx9DNzm/ZUgARJLovKMQKvp6Ml4CY1tvQySPZ1lxnj0R+WBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e86d59653c9df7e5042c434e66216644fc6781dc06a3eba241435fb2ed1ecf4d","last_reissued_at":"2026-05-18T02:23:17.059694Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:23:17.059694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1011.6669","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:23:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bzv5gOX3fkDVGGzEcJVTYHToF0KIb0Bw/qtR9DTQeye/crK0LRO9TsVyn/kAtoqzChFAeSxCVouqOsYs7YBCCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:08:10.022023Z"},"content_sha256":"00f284e0e369cb6e06a7b4b320e1c2f932505b08d5a2b1778bb018e63eb966ff","schema_version":"1.0","event_id":"sha256:00f284e0e369cb6e06a7b4b320e1c2f932505b08d5a2b1778bb018e63eb966ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:5BWVSZJ4TX36KBBMINHGMILGIT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unified Dark Matter scalar field models with fast transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Daniele Bertacca, Davide Pietrobon, Marco Bruni, Oliver F. Piattella","submitted_at":"2010-11-30T20:37:34Z","abstract_excerpt":"We investigate the general properties of Unified Dark Matter (UDM) scalar field models with Lagrangians with a non-canonical kinetic term, looking specifically for models that can produce a fast transition between an early Einstein-de Sitter CDM-like era and a later Dark Energy like phase, similarly to the barotropic fluid UDM models in JCAP1001(2010)014. However, while the background evolution can be very similar in the two cases, the perturbations are naturally adiabatic in fluid models, while in the scalar field case they are necessarily non-adiabatic. The new approach to building UDM Lagra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.6669","kind":"arxiv","version":3},"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":"2026-05-18T02:23:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SNNmhS3jB7Trn9kUX93QkxNUYPZXlk5yi8TzsL2YZQ/vne0GztwuprRu1HyUG94L2NqTv710ueaUtMjEs+l/DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T23:08:10.022457Z"},"content_sha256":"0572a6c04b30ffdcd2b1933e81233734d97091431af47db150aff135fd09547c","schema_version":"1.0","event_id":"sha256:0572a6c04b30ffdcd2b1933e81233734d97091431af47db150aff135fd09547c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5BWVSZJ4TX36KBBMINHGMILGIT/bundle.json","state_url":"https://pith.science/pith/5BWVSZJ4TX36KBBMINHGMILGIT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5BWVSZJ4TX36KBBMINHGMILGIT/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":"2026-08-10T23:08:10Z","links":{"resolver":"https://pith.science/pith/5BWVSZJ4TX36KBBMINHGMILGIT","bundle":"https://pith.science/pith/5BWVSZJ4TX36KBBMINHGMILGIT/bundle.json","state":"https://pith.science/pith/5BWVSZJ4TX36KBBMINHGMILGIT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5BWVSZJ4TX36KBBMINHGMILGIT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:5BWVSZJ4TX36KBBMINHGMILGIT","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":"5a60e2ae7a9a56af4846e06c11066d270006ac7339757d9a3891cc658363f3ae","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-30T20:37:34Z","title_canon_sha256":"86252d500da5f3b9769b4232a2e8252d5d03067c8ea90c5a9fadae29f4f245c2"},"schema_version":"1.0","source":{"id":"1011.6669","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.6669","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"arxiv_version","alias_value":"1011.6669v3","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.6669","created_at":"2026-05-18T02:23:17Z"},{"alias_kind":"pith_short_12","alias_value":"5BWVSZJ4TX36","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5BWVSZJ4TX36KBBM","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5BWVSZJ4","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:0572a6c04b30ffdcd2b1933e81233734d97091431af47db150aff135fd09547c","target":"graph","created_at":"2026-05-18T02:23:17Z","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 investigate the general properties of Unified Dark Matter (UDM) scalar field models with Lagrangians with a non-canonical kinetic term, looking specifically for models that can produce a fast transition between an early Einstein-de Sitter CDM-like era and a later Dark Energy like phase, similarly to the barotropic fluid UDM models in JCAP1001(2010)014. However, while the background evolution can be very similar in the two cases, the perturbations are naturally adiabatic in fluid models, while in the scalar field case they are necessarily non-adiabatic. The new approach to building UDM Lagra","authors_text":"Daniele Bertacca, Davide Pietrobon, Marco Bruni, Oliver F. Piattella","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-30T20:37:34Z","title":"Unified Dark Matter scalar field models with fast transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.6669","kind":"arxiv","version":3},"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":"sha256:00f284e0e369cb6e06a7b4b320e1c2f932505b08d5a2b1778bb018e63eb966ff","target":"record","created_at":"2026-05-18T02:23:17Z","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":"5a60e2ae7a9a56af4846e06c11066d270006ac7339757d9a3891cc658363f3ae","cross_cats_sorted":["gr-qc","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-30T20:37:34Z","title_canon_sha256":"86252d500da5f3b9769b4232a2e8252d5d03067c8ea90c5a9fadae29f4f245c2"},"schema_version":"1.0","source":{"id":"1011.6669","kind":"arxiv","version":3}},"canonical_sha256":"e86d59653c9df7e5042c434e66216644fc6781dc06a3eba241435fb2ed1ecf4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e86d59653c9df7e5042c434e66216644fc6781dc06a3eba241435fb2ed1ecf4d","first_computed_at":"2026-05-18T02:23:17.059694Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:23:17.059694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5dOEzTjaVQHE0JrTJFqojdbh2zueqNkbD00A9JNx9DNzm/ZUgARJLovKMQKvp6Ml4CY1tvQySPZ1lxnj0R+WBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:23:17.060240Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.6669","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00f284e0e369cb6e06a7b4b320e1c2f932505b08d5a2b1778bb018e63eb966ff","sha256:0572a6c04b30ffdcd2b1933e81233734d97091431af47db150aff135fd09547c"],"state_sha256":"a48cd3769e74659bcfd14b53837f9d372f2754c68d586bee26896e5d97dcb0e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rIOYfs85sTu1qMoK55YvO70zXUSM6TXpocMvUYfnjvdLpegbQ37CSTCSC88lFmI/o1b6RIJ4PhjdxZu4sfD0Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T23:08:10.026880Z","bundle_sha256":"aef621e41bd992f12c5146b467b3be82fc5c024fe97744ca8d23a741d98fd07d"}}