{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:GMI6UT5KMKP7AMCTBLC2HDEB3L","short_pith_number":"pith:GMI6UT5K","schema_version":"1.0","canonical_sha256":"3311ea4faa629ff030530ac5a38c81daf9888c2950efe820c40f8dbb893ef2e8","source":{"kind":"arxiv","id":"1303.4720","version":2},"attestation_state":"computed","paper":{"title":"Defect annihilation and proliferation in active nematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Luca Giomi, Mark J. Bowick, M. Cristina Marchetti, Xu Ma","submitted_at":"2013-03-19T19:53:23Z","abstract_excerpt":"Liquid crystals inevitably possess topological defect excitations generated through boundary conditions, applied fields or in quenches to the ordered phase. In equilibrium pairs of defects coarsen and annihilate as the uniform ground state is approached. Here we show that defects in active liquid crystals exhibit profoundly different behavior, depending on the degree of activity and its contractile or extensile character. While contractile systems enhance the annihilation dynamics of passive systems, extensile systems act to drive defects apart so that they swarm around in the manner of topolo"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1303.4720","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2013-03-19T19:53:23Z","cross_cats_sorted":[],"title_canon_sha256":"1907268af3592bcc607acbcb5b773cddbe8579a00977519f38c672295845a0bb","abstract_canon_sha256":"2e05cd3ca694b233f42703e70fbd27a010f3d74f664e7159f85aff01f87480ae"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:53.667213Z","signature_b64":"yWEp46UpK5yLb0uQFuAdM6jXMupqdJKYcCLDpy7RFC/XzDULTgnGvoTESH+i9j//Kp+t6h5EdGy8MzjPx+jWDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3311ea4faa629ff030530ac5a38c81daf9888c2950efe820c40f8dbb893ef2e8","last_reissued_at":"2026-05-18T03:21:53.666741Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:53.666741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Defect annihilation and proliferation in active nematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Luca Giomi, Mark J. Bowick, M. Cristina Marchetti, Xu Ma","submitted_at":"2013-03-19T19:53:23Z","abstract_excerpt":"Liquid crystals inevitably possess topological defect excitations generated through boundary conditions, applied fields or in quenches to the ordered phase. In equilibrium pairs of defects coarsen and annihilate as the uniform ground state is approached. Here we show that defects in active liquid crystals exhibit profoundly different behavior, depending on the degree of activity and its contractile or extensile character. While contractile systems enhance the annihilation dynamics of passive systems, extensile systems act to drive defects apart so that they swarm around in the manner of topolo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4720","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1303.4720","created_at":"2026-05-18T03:21:53.666797+00:00"},{"alias_kind":"arxiv_version","alias_value":"1303.4720v2","created_at":"2026-05-18T03:21:53.666797+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4720","created_at":"2026-05-18T03:21:53.666797+00:00"},{"alias_kind":"pith_short_12","alias_value":"GMI6UT5KMKP7","created_at":"2026-05-18T12:27:45.050594+00:00"},{"alias_kind":"pith_short_16","alias_value":"GMI6UT5KMKP7AMCT","created_at":"2026-05-18T12:27:45.050594+00:00"},{"alias_kind":"pith_short_8","alias_value":"GMI6UT5K","created_at":"2026-05-18T12:27:45.050594+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L","json":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L.json","graph_json":"https://pith.science/api/pith-number/GMI6UT5KMKP7AMCTBLC2HDEB3L/graph.json","events_json":"https://pith.science/api/pith-number/GMI6UT5KMKP7AMCTBLC2HDEB3L/events.json","paper":"https://pith.science/paper/GMI6UT5K"},"agent_actions":{"view_html":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L","download_json":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L.json","view_paper":"https://pith.science/paper/GMI6UT5K","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1303.4720&json=true","fetch_graph":"https://pith.science/api/pith-number/GMI6UT5KMKP7AMCTBLC2HDEB3L/graph.json","fetch_events":"https://pith.science/api/pith-number/GMI6UT5KMKP7AMCTBLC2HDEB3L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L/action/storage_attestation","attest_author":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L/action/author_attestation","sign_citation":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L/action/citation_signature","submit_replication":"https://pith.science/pith/GMI6UT5KMKP7AMCTBLC2HDEB3L/action/replication_record"}},"created_at":"2026-05-18T03:21:53.666797+00:00","updated_at":"2026-05-18T03:21:53.666797+00:00"}