{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AIIQ47GUN77IQTYPKAZW7UNJ3K","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":"184435b9e16780d6ffbc23c33ff2fd9a17118d226d9d94cd6a209f59f1b8939d","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2015-01-28T07:34:07Z","title_canon_sha256":"e7fa90b7a62b3e524c34772b645ef873ac8175c785d37f64306ea43fd3e8a9ec"},"schema_version":"1.0","source":{"id":"1501.07010","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07010","created_at":"2026-05-18T01:35:39Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07010v2","created_at":"2026-05-18T01:35:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07010","created_at":"2026-05-18T01:35:39Z"},{"alias_kind":"pith_short_12","alias_value":"AIIQ47GUN77I","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"AIIQ47GUN77IQTYP","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"AIIQ47GU","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:28ca0d13ba3ef34c11308dbffa13d593630a708c3094a01047e079a58bf2b7b5","target":"graph","created_at":"2026-05-18T01:35:39Z","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 detailed study of the large-scale collective properties of self-propelled particles (SPPs) moving in two-dimensional heterogeneous space. The impact of spatial heterogeneities on the ordered, collectively moving phase is investigated. We show that for strong enough spatial heterogeneity, the well-documented high-density, high-ordered propagating bands that emerge in homogeneous space disappear. Moreover, the ordered phase does not exhibit long-range order, as occurs in homogeneous systems, but rather quasi-long range order: i.e. the SPP system becomes disordered in the thermodynam","authors_text":"Fernando Peruani, Oleksandr Chepizhko","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2015-01-28T07:34:07Z","title":"Active particles in heterogeneous media display new physics: existence of optimal noise and absence of bands and long-range order"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07010","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":"sha256:2eb228492a51298703713a334eb9f009d8273cebab42c92f85edbd915a510ba8","target":"record","created_at":"2026-05-18T01:35:39Z","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":"184435b9e16780d6ffbc23c33ff2fd9a17118d226d9d94cd6a209f59f1b8939d","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2015-01-28T07:34:07Z","title_canon_sha256":"e7fa90b7a62b3e524c34772b645ef873ac8175c785d37f64306ea43fd3e8a9ec"},"schema_version":"1.0","source":{"id":"1501.07010","kind":"arxiv","version":2}},"canonical_sha256":"02110e7cd46ffe884f0f50336fd1a9dabc387ada8f33b8bf4e3b0f2cfcdfcf42","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02110e7cd46ffe884f0f50336fd1a9dabc387ada8f33b8bf4e3b0f2cfcdfcf42","first_computed_at":"2026-05-18T01:35:39.916449Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:39.916449Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0I0tb/iP5iD6ruDMnmisLMoOsKjljtf/SjiTNfpuW8pJaLPalK/O4UfwbYBu7YAlhlDYkSXHGEmgC83CcUCwDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:39.917344Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.07010","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2eb228492a51298703713a334eb9f009d8273cebab42c92f85edbd915a510ba8","sha256:28ca0d13ba3ef34c11308dbffa13d593630a708c3094a01047e079a58bf2b7b5"],"state_sha256":"6288f1b48507269d9500a28f07ec2bb13e632e90c3eed377ef830efae3757b83"}