{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OIQO25KEL26SL675I763FIVQL2","short_pith_number":"pith:OIQO25KE","canonical_record":{"source":{"id":"1705.08575","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2017-05-24T01:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"6b5ed391c8e47a164e98f7fdaeb2ae1cf693c6ae5509cdb9f710eb4cc14efc74","abstract_canon_sha256":"ade2dccd7ef30353e1b129ace067b417dba8023a25c9243f9fa1e713bc2714d4"},"schema_version":"1.0"},"canonical_sha256":"7220ed75445ebd25fbfd47fdb2a2b05eb6cbb2c1903af894db69b39131a5effa","source":{"kind":"arxiv","id":"1705.08575","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.08575","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"1705.08575v1","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.08575","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"OIQO25KEL26S","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OIQO25KEL26SL675","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OIQO25KE","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OIQO25KEL26SL675I763FIVQL2","target":"record","payload":{"canonical_record":{"source":{"id":"1705.08575","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2017-05-24T01:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"6b5ed391c8e47a164e98f7fdaeb2ae1cf693c6ae5509cdb9f710eb4cc14efc74","abstract_canon_sha256":"ade2dccd7ef30353e1b129ace067b417dba8023a25c9243f9fa1e713bc2714d4"},"schema_version":"1.0"},"canonical_sha256":"7220ed75445ebd25fbfd47fdb2a2b05eb6cbb2c1903af894db69b39131a5effa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:05.538053Z","signature_b64":"YN4isE2aWTpN5Kt/FDh5diBwoyXQGuEhx74nRiXLXIFI4xsA75KM3wxajptHgNC1YOx0om1TJYF3Csy+f64oBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7220ed75445ebd25fbfd47fdb2a2b05eb6cbb2c1903af894db69b39131a5effa","last_reissued_at":"2026-05-18T00:15:05.537301Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:05.537301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.08575","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":"2026-05-18T00:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xu2ADG5P52z1BhnogrK17upBpXnF7j2srK1cvX1+sojfrAvfH70J2TqBzwCoYZalsqatDhezyqInCDWi9zthAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:55:04.060600Z"},"content_sha256":"d1ef30a73683f2ba1555c0b3a26ad69cbf14fb95cd8e1ae91920f4330a7350ae","schema_version":"1.0","event_id":"sha256:d1ef30a73683f2ba1555c0b3a26ad69cbf14fb95cd8e1ae91920f4330a7350ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OIQO25KEL26SL675I763FIVQL2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transient transition from free carrier metallic state to exciton insulating state in GaAs by ultrafast photoexcitation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Fan Li, Hai-Ying Song, H. Y. Liu, Jian-Qiao Meng, Peng Gu, Shi-Bing Liu, X. C. Nie, Xiu Zhang, Yu-Xia Duin","submitted_at":"2017-05-24T01:22:55Z","abstract_excerpt":"We present systematic studies of the transient dynamics of GaAs by ultrafast time-resolved optical reflectivity. In photo excited non-equilibrium states, we found a sign reverse in transient reflectivity spectra $\\Delta R/R$ (t $>$ 0), from positive around room temperature to negative at cryogenic temperatures. The former corresponds to a transient free carrier metallic state, while the latter is attributed to an exciton insulating state, in which the transient electronic properties is mostly dominated by excitons, resulting in a transient metal-insulator transition (MIT). Two transition tempe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.08575","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":"2026-05-18T00:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1nEhsOMYiGYrSbFzD1RU0AlaRQoNth6EHYT21SIErWfo1AI0GFiHaYV72kuNRSq2vNr4amvCJcA+65bsGBlABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:55:04.060952Z"},"content_sha256":"accc604ceb7f92f3d52dbf6517fda2deff2738a152245c4ff485c0bdddb71493","schema_version":"1.0","event_id":"sha256:accc604ceb7f92f3d52dbf6517fda2deff2738a152245c4ff485c0bdddb71493"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OIQO25KEL26SL675I763FIVQL2/bundle.json","state_url":"https://pith.science/pith/OIQO25KEL26SL675I763FIVQL2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OIQO25KEL26SL675I763FIVQL2/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":"2026-06-05T13:55:04Z","links":{"resolver":"https://pith.science/pith/OIQO25KEL26SL675I763FIVQL2","bundle":"https://pith.science/pith/OIQO25KEL26SL675I763FIVQL2/bundle.json","state":"https://pith.science/pith/OIQO25KEL26SL675I763FIVQL2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OIQO25KEL26SL675I763FIVQL2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OIQO25KEL26SL675I763FIVQL2","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":"ade2dccd7ef30353e1b129ace067b417dba8023a25c9243f9fa1e713bc2714d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2017-05-24T01:22:55Z","title_canon_sha256":"6b5ed391c8e47a164e98f7fdaeb2ae1cf693c6ae5509cdb9f710eb4cc14efc74"},"schema_version":"1.0","source":{"id":"1705.08575","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.08575","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"1705.08575v1","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.08575","created_at":"2026-05-18T00:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"OIQO25KEL26S","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OIQO25KEL26SL675","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OIQO25KE","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:accc604ceb7f92f3d52dbf6517fda2deff2738a152245c4ff485c0bdddb71493","target":"graph","created_at":"2026-05-18T00:15:05Z","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 systematic studies of the transient dynamics of GaAs by ultrafast time-resolved optical reflectivity. In photo excited non-equilibrium states, we found a sign reverse in transient reflectivity spectra $\\Delta R/R$ (t $>$ 0), from positive around room temperature to negative at cryogenic temperatures. The former corresponds to a transient free carrier metallic state, while the latter is attributed to an exciton insulating state, in which the transient electronic properties is mostly dominated by excitons, resulting in a transient metal-insulator transition (MIT). Two transition tempe","authors_text":"Fan Li, Hai-Ying Song, H. Y. Liu, Jian-Qiao Meng, Peng Gu, Shi-Bing Liu, X. C. Nie, Xiu Zhang, Yu-Xia Duin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2017-05-24T01:22:55Z","title":"Transient transition from free carrier metallic state to exciton insulating state in GaAs by ultrafast photoexcitation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.08575","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:d1ef30a73683f2ba1555c0b3a26ad69cbf14fb95cd8e1ae91920f4330a7350ae","target":"record","created_at":"2026-05-18T00:15:05Z","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":"ade2dccd7ef30353e1b129ace067b417dba8023a25c9243f9fa1e713bc2714d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2017-05-24T01:22:55Z","title_canon_sha256":"6b5ed391c8e47a164e98f7fdaeb2ae1cf693c6ae5509cdb9f710eb4cc14efc74"},"schema_version":"1.0","source":{"id":"1705.08575","kind":"arxiv","version":1}},"canonical_sha256":"7220ed75445ebd25fbfd47fdb2a2b05eb6cbb2c1903af894db69b39131a5effa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7220ed75445ebd25fbfd47fdb2a2b05eb6cbb2c1903af894db69b39131a5effa","first_computed_at":"2026-05-18T00:15:05.537301Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:05.537301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YN4isE2aWTpN5Kt/FDh5diBwoyXQGuEhx74nRiXLXIFI4xsA75KM3wxajptHgNC1YOx0om1TJYF3Csy+f64oBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:05.538053Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.08575","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d1ef30a73683f2ba1555c0b3a26ad69cbf14fb95cd8e1ae91920f4330a7350ae","sha256:accc604ceb7f92f3d52dbf6517fda2deff2738a152245c4ff485c0bdddb71493"],"state_sha256":"5bfe5df68a5cf5d9ecd6b0c8424a5be3103f44b4417cea1b50690d1e1bb1ecc3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EqHyj6BTgfFMV6oAfL+OwlSqphDrd8YSVAtkjOBxUd0J6Rfa6Ks7vJvBDUjZz3mUC3feyF5U9ASQH+aiZK5GDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T13:55:04.063074Z","bundle_sha256":"ba62c3d3e84e52642e0d175fb505b0ac7062dd6b5e5d7da2a2e98790e6c20e1e"}}