{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:3PJK3GGPNI7JKC4PGRM6V3XRIX","short_pith_number":"pith:3PJK3GGP","canonical_record":{"source":{"id":"1403.2364","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2014-03-10T19:45:54Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"633050d728c8473961f4a09c380de4df607a87b2ff8e71decccc3a8ea72e67a2","abstract_canon_sha256":"158186e4247d60bc83734e04b239ead30ebb395a86709c5089f572314dbfee1d"},"schema_version":"1.0"},"canonical_sha256":"dbd2ad98cf6a3e950b8f3459eaeef145db493d1ac66ab653b7f557aa229a515d","source":{"kind":"arxiv","id":"1403.2364","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2364","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2364v2","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2364","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"3PJK3GGPNI7J","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3PJK3GGPNI7JKC4P","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3PJK3GGP","created_at":"2026-05-18T12:28:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:3PJK3GGPNI7JKC4PGRM6V3XRIX","target":"record","payload":{"canonical_record":{"source":{"id":"1403.2364","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2014-03-10T19:45:54Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"633050d728c8473961f4a09c380de4df607a87b2ff8e71decccc3a8ea72e67a2","abstract_canon_sha256":"158186e4247d60bc83734e04b239ead30ebb395a86709c5089f572314dbfee1d"},"schema_version":"1.0"},"canonical_sha256":"dbd2ad98cf6a3e950b8f3459eaeef145db493d1ac66ab653b7f557aa229a515d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:51:41.465740Z","signature_b64":"PfmHwEyAl0HFmw3tzoMvDVkV/8P5RuOEJJ0egkXgvzLF/KBQ1Xi8F6mkZrEH4ZpzuBH3/QX5PHPxEjOqgd0oCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dbd2ad98cf6a3e950b8f3459eaeef145db493d1ac66ab653b7f557aa229a515d","last_reissued_at":"2026-05-18T02:51:41.465264Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:51:41.465264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.2364","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":"2026-05-18T02:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VXVKpq8uyqqs5L3JfJQFnIw9sTCLq3t5PCnX70ALLen8vjgzldpNo3ydd5/MHnvEPbYe4sQ4Q7Fnl31efdAzBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:38:15.099831Z"},"content_sha256":"2bab2d32ab0b339ede00bcae4ef5372be3e794530b080e7d37be5252cdd19f0d","schema_version":"1.0","event_id":"sha256:2bab2d32ab0b339ede00bcae4ef5372be3e794530b080e7d37be5252cdd19f0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:3PJK3GGPNI7JKC4PGRM6V3XRIX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Motility-induced phase separation of active particles in the presence of velocity alignment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft"],"primary_cat":"physics.bio-ph","authors_text":"Fernando Peruani, Julien Barre, Massimiliano Muratori, Raphael Chetrite","submitted_at":"2014-03-10T19:45:54Z","abstract_excerpt":"Self-propelled particle (SPP) systems are intrinsically out of equilibrium systems, where each individual particle converts energy into work to move in a dissipative medium. When interacting through a velocity alignment mechanism, and the medium acts as a momentum sink, even momentum is not conserved. In this scenario, a mapping into an equilibrium system seems unlikely. Here, we show that an entropy functional can be derived for SPPs with velocity alignment and density-dependent speed, at least in the (orientationally) disordered phase. This non-trivial result has important physical consequen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2364","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":"2026-05-18T02:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zKnmP3okUMnSa4RoXm8g8WDzodq5VtDMuig/z19PwDqIzgovuUe4SuRaiBhJuk3tUoPrvRUwQRCyvmrhpePLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:38:15.100525Z"},"content_sha256":"a41332ba6b8040e7bdfd1121f25e9a701f3246c3709f5336952bc7ac02fa3746","schema_version":"1.0","event_id":"sha256:a41332ba6b8040e7bdfd1121f25e9a701f3246c3709f5336952bc7ac02fa3746"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/bundle.json","state_url":"https://pith.science/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/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":"2026-05-25T20:38:15Z","links":{"resolver":"https://pith.science/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX","bundle":"https://pith.science/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/bundle.json","state":"https://pith.science/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3PJK3GGPNI7JKC4PGRM6V3XRIX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:3PJK3GGPNI7JKC4PGRM6V3XRIX","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":"158186e4247d60bc83734e04b239ead30ebb395a86709c5089f572314dbfee1d","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2014-03-10T19:45:54Z","title_canon_sha256":"633050d728c8473961f4a09c380de4df607a87b2ff8e71decccc3a8ea72e67a2"},"schema_version":"1.0","source":{"id":"1403.2364","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2364","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2364v2","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2364","created_at":"2026-05-18T02:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"3PJK3GGPNI7J","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3PJK3GGPNI7JKC4P","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3PJK3GGP","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:a41332ba6b8040e7bdfd1121f25e9a701f3246c3709f5336952bc7ac02fa3746","target":"graph","created_at":"2026-05-18T02:51:41Z","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":"Self-propelled particle (SPP) systems are intrinsically out of equilibrium systems, where each individual particle converts energy into work to move in a dissipative medium. When interacting through a velocity alignment mechanism, and the medium acts as a momentum sink, even momentum is not conserved. In this scenario, a mapping into an equilibrium system seems unlikely. Here, we show that an entropy functional can be derived for SPPs with velocity alignment and density-dependent speed, at least in the (orientationally) disordered phase. This non-trivial result has important physical consequen","authors_text":"Fernando Peruani, Julien Barre, Massimiliano Muratori, Raphael Chetrite","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2014-03-10T19:45:54Z","title":"Motility-induced phase separation of active particles in the presence of velocity alignment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2364","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":"sha256:2bab2d32ab0b339ede00bcae4ef5372be3e794530b080e7d37be5252cdd19f0d","target":"record","created_at":"2026-05-18T02:51:41Z","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":"158186e4247d60bc83734e04b239ead30ebb395a86709c5089f572314dbfee1d","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2014-03-10T19:45:54Z","title_canon_sha256":"633050d728c8473961f4a09c380de4df607a87b2ff8e71decccc3a8ea72e67a2"},"schema_version":"1.0","source":{"id":"1403.2364","kind":"arxiv","version":2}},"canonical_sha256":"dbd2ad98cf6a3e950b8f3459eaeef145db493d1ac66ab653b7f557aa229a515d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dbd2ad98cf6a3e950b8f3459eaeef145db493d1ac66ab653b7f557aa229a515d","first_computed_at":"2026-05-18T02:51:41.465264Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:51:41.465264Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PfmHwEyAl0HFmw3tzoMvDVkV/8P5RuOEJJ0egkXgvzLF/KBQ1Xi8F6mkZrEH4ZpzuBH3/QX5PHPxEjOqgd0oCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:51:41.465740Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.2364","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2bab2d32ab0b339ede00bcae4ef5372be3e794530b080e7d37be5252cdd19f0d","sha256:a41332ba6b8040e7bdfd1121f25e9a701f3246c3709f5336952bc7ac02fa3746"],"state_sha256":"53ebc0aa9f88f4f00e62a822ee365fc089000317d9834d129624d96375cb7e6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nVLTbnLj7GFDX0xD5ST5Ai4/38GozmtL6FgrBcPA/EGJBUyFwzsFS5iSNtOS/AUGB+yqpH+VZ42et01gx95wCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:38:15.103667Z","bundle_sha256":"8fa2517e1130695fa5aec3b89ac335a408d2dc12b41e98815315d6676d0d9d46"}}