{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4RB56YNGALKMPETR7GAUCYN37Q","short_pith_number":"pith:4RB56YNG","canonical_record":{"source":{"id":"1504.07447","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-04-28T12:32:22Z","cross_cats_sorted":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"title_canon_sha256":"793eeb12de67458a0fee73f5c69c0ca4bed997a6c18541bfa279bc6a33bf87c0","abstract_canon_sha256":"9dccc9d50a7b2fa1b6dbdc69b95c10cda8187f833eaf01df3053185cc3d7cf6e"},"schema_version":"1.0"},"canonical_sha256":"e443df61a602d4c79271f9814161bbfc30de624ca78eb97776f64c6e45b9f405","source":{"kind":"arxiv","id":"1504.07447","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07447","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07447v1","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07447","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"pith_short_12","alias_value":"4RB56YNGALKM","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4RB56YNGALKMPETR","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4RB56YNG","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4RB56YNGALKMPETR7GAUCYN37Q","target":"record","payload":{"canonical_record":{"source":{"id":"1504.07447","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-04-28T12:32:22Z","cross_cats_sorted":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"title_canon_sha256":"793eeb12de67458a0fee73f5c69c0ca4bed997a6c18541bfa279bc6a33bf87c0","abstract_canon_sha256":"9dccc9d50a7b2fa1b6dbdc69b95c10cda8187f833eaf01df3053185cc3d7cf6e"},"schema_version":"1.0"},"canonical_sha256":"e443df61a602d4c79271f9814161bbfc30de624ca78eb97776f64c6e45b9f405","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:42.949691Z","signature_b64":"BqRIvv/BXoHctrhhlGMfmuW/baSW5hTraMzE/FOcZp2fHrjnNoPIPuoIUAEDOANKNXSr+M51BIGMaVvHQU6NCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e443df61a602d4c79271f9814161bbfc30de624ca78eb97776f64c6e45b9f405","last_reissued_at":"2026-05-18T01:26:42.949052Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:42.949052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.07447","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":"2026-05-18T01:26:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n1y38QHgwjW/oDTuhiJyRLyqzVAQwe63tYP/2PplojPpq+kVA2AtOCbiElY1WHwLqBR3sSs3bHDYSTqJSRlpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T06:57:07.235397Z"},"content_sha256":"2a67f484d6be37d961aba8083c96ff65685226eff359dd70ec47f609efd53ac0","schema_version":"1.0","event_id":"sha256:2a67f484d6be37d961aba8083c96ff65685226eff359dd70ec47f609efd53ac0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4RB56YNGALKMPETR7GAUCYN37Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active Model H: Scalar Active Matter in a Momentum-Conserving Fluid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"primary_cat":"cond-mat.soft","authors_text":"Adriano Tiribocchi, Davide Marenduzzo, Michael E. Cates, Raphael Wittkowski","submitted_at":"2015-04-28T12:32:22Z","abstract_excerpt":"We present a continuum theory of self-propelled particles, without alignment interactions, in a momentum-conserving solvent. To address phase separation we introduce a scalar concentration field $\\phi$ with advective-diffusive dynamics. Activity creates a contribution $\\Sigma_{ij}=-\\zeta((\\partial_i\\phi)(\\partial_j\\phi)-(\\nabla\\phi)^{2}\\delta_{ij}/d)$ to the deviatoric stress, where $\\zeta$ is odd under time reversal and $d$ is the number of spatial dimensions; this causes an effective interfacial tension contribution that is negative for contractile swimmers. We predict that domain growth the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07447","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":"2026-05-18T01:26:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CM370kNFsyURg45TksgG1ZivPN43RAaIYnewCv+c1764rplaIcpdLGW3ow7k3Sgn3HBE4kCPuZDCH7Q18AEWDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T06:57:07.236064Z"},"content_sha256":"289c01b891ed4f7d961c85b9392f2f2a1ae8b4e4c97aaf92760fb523b61dcb3a","schema_version":"1.0","event_id":"sha256:289c01b891ed4f7d961c85b9392f2f2a1ae8b4e4c97aaf92760fb523b61dcb3a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RB56YNGALKMPETR7GAUCYN37Q/bundle.json","state_url":"https://pith.science/pith/4RB56YNGALKMPETR7GAUCYN37Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RB56YNGALKMPETR7GAUCYN37Q/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":"2026-05-22T06:57:07Z","links":{"resolver":"https://pith.science/pith/4RB56YNGALKMPETR7GAUCYN37Q","bundle":"https://pith.science/pith/4RB56YNGALKMPETR7GAUCYN37Q/bundle.json","state":"https://pith.science/pith/4RB56YNGALKMPETR7GAUCYN37Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RB56YNGALKMPETR7GAUCYN37Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4RB56YNGALKMPETR7GAUCYN37Q","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":"9dccc9d50a7b2fa1b6dbdc69b95c10cda8187f833eaf01df3053185cc3d7cf6e","cross_cats_sorted":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-04-28T12:32:22Z","title_canon_sha256":"793eeb12de67458a0fee73f5c69c0ca4bed997a6c18541bfa279bc6a33bf87c0"},"schema_version":"1.0","source":{"id":"1504.07447","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07447","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07447v1","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07447","created_at":"2026-05-18T01:26:42Z"},{"alias_kind":"pith_short_12","alias_value":"4RB56YNGALKM","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4RB56YNGALKMPETR","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4RB56YNG","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:289c01b891ed4f7d961c85b9392f2f2a1ae8b4e4c97aaf92760fb523b61dcb3a","target":"graph","created_at":"2026-05-18T01:26:42Z","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 present a continuum theory of self-propelled particles, without alignment interactions, in a momentum-conserving solvent. To address phase separation we introduce a scalar concentration field $\\phi$ with advective-diffusive dynamics. Activity creates a contribution $\\Sigma_{ij}=-\\zeta((\\partial_i\\phi)(\\partial_j\\phi)-(\\nabla\\phi)^{2}\\delta_{ij}/d)$ to the deviatoric stress, where $\\zeta$ is odd under time reversal and $d$ is the number of spatial dimensions; this causes an effective interfacial tension contribution that is negative for contractile swimmers. We predict that domain growth the","authors_text":"Adriano Tiribocchi, Davide Marenduzzo, Michael E. Cates, Raphael Wittkowski","cross_cats":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-04-28T12:32:22Z","title":"Active Model H: Scalar Active Matter in a Momentum-Conserving Fluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07447","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":"sha256:2a67f484d6be37d961aba8083c96ff65685226eff359dd70ec47f609efd53ac0","target":"record","created_at":"2026-05-18T01:26:42Z","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":"9dccc9d50a7b2fa1b6dbdc69b95c10cda8187f833eaf01df3053185cc3d7cf6e","cross_cats_sorted":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-04-28T12:32:22Z","title_canon_sha256":"793eeb12de67458a0fee73f5c69c0ca4bed997a6c18541bfa279bc6a33bf87c0"},"schema_version":"1.0","source":{"id":"1504.07447","kind":"arxiv","version":1}},"canonical_sha256":"e443df61a602d4c79271f9814161bbfc30de624ca78eb97776f64c6e45b9f405","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e443df61a602d4c79271f9814161bbfc30de624ca78eb97776f64c6e45b9f405","first_computed_at":"2026-05-18T01:26:42.949052Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:42.949052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BqRIvv/BXoHctrhhlGMfmuW/baSW5hTraMzE/FOcZp2fHrjnNoPIPuoIUAEDOANKNXSr+M51BIGMaVvHQU6NCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:42.949691Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07447","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a67f484d6be37d961aba8083c96ff65685226eff359dd70ec47f609efd53ac0","sha256:289c01b891ed4f7d961c85b9392f2f2a1ae8b4e4c97aaf92760fb523b61dcb3a"],"state_sha256":"79474202db0409b72b6a2d2eea4305211e6fdd709c0ab98fb622423a3effc00b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"99NvqYXPu/78wWJqU1TXDRWjPtAtlHS0bXQF8u4dmwb82k8N6uz9MTahIWizSbUYQ1pdHvh5kAKLlQS1Of6kAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T06:57:07.239716Z","bundle_sha256":"d0f46073485e4d343d28738cecb78852f3047126500805123fa55be2f5f8a48a"}}