{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:SX4PC4LILI4ADWD3RLBAFRA5O5","short_pith_number":"pith:SX4PC4LI","canonical_record":{"source":{"id":"1108.3738","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-18T12:26:46Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"e2430abd7c54047fe006c329cab6a7bb2be567f97a2fda2b18aafbc91b2dddff","abstract_canon_sha256":"545b123d75c09a71b4170270331d00f645d302009871447e2b7464833084790a"},"schema_version":"1.0"},"canonical_sha256":"95f8f171685a3801d87b8ac202c41d777115081265ac1650419c0c390bbc6ff4","source":{"kind":"arxiv","id":"1108.3738","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3738","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3738v1","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3738","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"SX4PC4LILI4A","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"SX4PC4LILI4ADWD3","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"SX4PC4LI","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:SX4PC4LILI4ADWD3RLBAFRA5O5","target":"record","payload":{"canonical_record":{"source":{"id":"1108.3738","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-18T12:26:46Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"e2430abd7c54047fe006c329cab6a7bb2be567f97a2fda2b18aafbc91b2dddff","abstract_canon_sha256":"545b123d75c09a71b4170270331d00f645d302009871447e2b7464833084790a"},"schema_version":"1.0"},"canonical_sha256":"95f8f171685a3801d87b8ac202c41d777115081265ac1650419c0c390bbc6ff4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:15:07.547459Z","signature_b64":"C+oKpjNV586bjeUxpL9AvW0t6y2B4/Wn95XP5e+juAi/iQt+uB/w5tUrfcuFBwObHzzEu74jss29NB74vUGrAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95f8f171685a3801d87b8ac202c41d777115081265ac1650419c0c390bbc6ff4","last_reissued_at":"2026-05-18T04:15:07.546682Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:15:07.546682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.3738","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":"2026-05-18T04:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zQQWsYPglM6QC4LAggvW80m9spLzNzKuFZoqnZsqylkQIh/TopfKHngJVicH9bIUQHiVxAVcfA/+fHF4IAK3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T20:58:16.046138Z"},"content_sha256":"f97669b08b62119b014b1da023b12fb3c1b4bb93a082b6f0154dcdc9130755d4","schema_version":"1.0","event_id":"sha256:f97669b08b62119b014b1da023b12fb3c1b4bb93a082b6f0154dcdc9130755d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:SX4PC4LILI4ADWD3RLBAFRA5O5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Excitability in optical systems close to Z2-symmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"physics.optics","authors_text":"Gabor Mezosi, Guy Van der Sande, Guy Verschaffelt, Jan Danckaert, Lendert Gelens, Lilia Mashall, Marc Sorel, Stefano Beri","submitted_at":"2011-08-18T12:26:46Z","abstract_excerpt":"We report theoretically and experimentally on excitability in semiconductor ring lasers in order to reveal a mechanism of excitability, general for systems close to Z2-symmetry. The global shapes of the invariant manifolds of a saddle in the vicinity of a homoclinic loop determine the origin of excitability and the fea- tures of the excitable pulses. We show how to experimentally make a semiconductor ring laser excitable by breaking the Z2-symmetry in a controlled way. The experiments confirm the theoretical predictions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3738","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":"2026-05-18T04:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ciAF5RvkXwF1bkEU/mY0KFqFGWSu2iZut/TRCJGJuRRO4kRnC20ksQqLLgK3DQQOBaI1oZ92rWaMM0PAxXnZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T20:58:16.046496Z"},"content_sha256":"4b0626fce3344cee840902cf01a32c71440ef6ec065ebcfb53c14f30d5a80e6e","schema_version":"1.0","event_id":"sha256:4b0626fce3344cee840902cf01a32c71440ef6ec065ebcfb53c14f30d5a80e6e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/bundle.json","state_url":"https://pith.science/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/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":"2026-06-24T20:58:16Z","links":{"resolver":"https://pith.science/pith/SX4PC4LILI4ADWD3RLBAFRA5O5","bundle":"https://pith.science/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/bundle.json","state":"https://pith.science/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SX4PC4LILI4ADWD3RLBAFRA5O5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:SX4PC4LILI4ADWD3RLBAFRA5O5","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":"545b123d75c09a71b4170270331d00f645d302009871447e2b7464833084790a","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-18T12:26:46Z","title_canon_sha256":"e2430abd7c54047fe006c329cab6a7bb2be567f97a2fda2b18aafbc91b2dddff"},"schema_version":"1.0","source":{"id":"1108.3738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3738","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3738v1","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3738","created_at":"2026-05-18T04:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"SX4PC4LILI4A","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"SX4PC4LILI4ADWD3","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"SX4PC4LI","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:4b0626fce3344cee840902cf01a32c71440ef6ec065ebcfb53c14f30d5a80e6e","target":"graph","created_at":"2026-05-18T04:15:07Z","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 report theoretically and experimentally on excitability in semiconductor ring lasers in order to reveal a mechanism of excitability, general for systems close to Z2-symmetry. The global shapes of the invariant manifolds of a saddle in the vicinity of a homoclinic loop determine the origin of excitability and the fea- tures of the excitable pulses. We show how to experimentally make a semiconductor ring laser excitable by breaking the Z2-symmetry in a controlled way. The experiments confirm the theoretical predictions.","authors_text":"Gabor Mezosi, Guy Van der Sande, Guy Verschaffelt, Jan Danckaert, Lendert Gelens, Lilia Mashall, Marc Sorel, Stefano Beri","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-18T12:26:46Z","title":"Excitability in optical systems close to Z2-symmetry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3738","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:f97669b08b62119b014b1da023b12fb3c1b4bb93a082b6f0154dcdc9130755d4","target":"record","created_at":"2026-05-18T04:15:07Z","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":"545b123d75c09a71b4170270331d00f645d302009871447e2b7464833084790a","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-18T12:26:46Z","title_canon_sha256":"e2430abd7c54047fe006c329cab6a7bb2be567f97a2fda2b18aafbc91b2dddff"},"schema_version":"1.0","source":{"id":"1108.3738","kind":"arxiv","version":1}},"canonical_sha256":"95f8f171685a3801d87b8ac202c41d777115081265ac1650419c0c390bbc6ff4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95f8f171685a3801d87b8ac202c41d777115081265ac1650419c0c390bbc6ff4","first_computed_at":"2026-05-18T04:15:07.546682Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:15:07.546682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C+oKpjNV586bjeUxpL9AvW0t6y2B4/Wn95XP5e+juAi/iQt+uB/w5tUrfcuFBwObHzzEu74jss29NB74vUGrAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:15:07.547459Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.3738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f97669b08b62119b014b1da023b12fb3c1b4bb93a082b6f0154dcdc9130755d4","sha256:4b0626fce3344cee840902cf01a32c71440ef6ec065ebcfb53c14f30d5a80e6e"],"state_sha256":"0edd2e50ee22a162f6704897961f70497d342a3d91d3ce04d3eec562d2cd500b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N0wim/IE/0sCuR4meUTut8/WLCOdvkpAhfKRnuaPFKFcqf4/ahc0lUSBY0GHQtMg2XUJPUq124lCKt2bE6JcBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T20:58:16.049294Z","bundle_sha256":"4c6a073a91159185213961b0fa25ed5133970fb05fb3084f747cb37617d60d5b"}}