{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:L3P225NPGPN3WRI6FYWXQHT2DC","short_pith_number":"pith:L3P225NP","canonical_record":{"source":{"id":"1911.12145","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-11-27T13:29:02Z","cross_cats_sorted":[],"title_canon_sha256":"ab16815e90752243b833b0e4d515ae046cc558c9dba7d16454303377160a3b94","abstract_canon_sha256":"5977c5d80caad056902d6f53c1c143d592531d3bcb609f5bcc36ac185a2ef74c"},"schema_version":"1.0"},"canonical_sha256":"5edfad75af33dbbb451e2e2d781e7a1885fbdb0c93bb7f2ba14a6332dc9286b2","source":{"kind":"arxiv","id":"1911.12145","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.12145","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"arxiv_version","alias_value":"1911.12145v2","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.12145","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_12","alias_value":"L3P225NPGPN3","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_16","alias_value":"L3P225NPGPN3WRI6","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_8","alias_value":"L3P225NP","created_at":"2026-07-05T10:07:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:L3P225NPGPN3WRI6FYWXQHT2DC","target":"record","payload":{"canonical_record":{"source":{"id":"1911.12145","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-11-27T13:29:02Z","cross_cats_sorted":[],"title_canon_sha256":"ab16815e90752243b833b0e4d515ae046cc558c9dba7d16454303377160a3b94","abstract_canon_sha256":"5977c5d80caad056902d6f53c1c143d592531d3bcb609f5bcc36ac185a2ef74c"},"schema_version":"1.0"},"canonical_sha256":"5edfad75af33dbbb451e2e2d781e7a1885fbdb0c93bb7f2ba14a6332dc9286b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:07:36.569245Z","signature_b64":"fyUKM2WMvuEB7KY0Edy2sy8ENFDBNntwmEvmhIR+vfZ3d9GWLbOMUuU3S37o5yNwxtyQWrJA0nWTw82ewuE3AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5edfad75af33dbbb451e2e2d781e7a1885fbdb0c93bb7f2ba14a6332dc9286b2","last_reissued_at":"2026-07-05T10:07:36.568676Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:07:36.568676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.12145","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":"2026-07-05T10:07:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SYDsexkc1l4GNknSSt+AKvtRpgEe+HiXsoKBqwmgZmdr/1iXdwEQ5qSM4kNcx09tnvJK7apkG8R6SOxsoQRLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T01:04:10.412595Z"},"content_sha256":"184b2118458ddeee8d5c5cc1ed203a6ca9ba372a4bf723ffef50eba3bdff9128","schema_version":"1.0","event_id":"sha256:184b2118458ddeee8d5c5cc1ed203a6ca9ba372a4bf723ffef50eba3bdff9128"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:L3P225NPGPN3WRI6FYWXQHT2DC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of non-thermal phonon and electron populations in photo-excited germanium on picosecond timescales","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"D. Reis, \\'E. D. Murray, F. Murphy-Armando, I. Savi\\'c, M. Trigo, S. Fahy","submitted_at":"2019-11-27T13:29:02Z","abstract_excerpt":"We investigate from first-principles theory and experiment the generation of phonons on picosecond timescales and the relaxation of carriers in multiple conduction band valleys of photo-excited Ge by inter-valley electron-phonon scattering. We provide a full description of the phonon and electron relaxation dynamics without adjustable parameters. Simulations of the time-evolution of phonon populations, based on first-principles band structure and electron-phonon and phonon-phonon matrix elements, are compared with data from time-resolved x-ray diffuse scattering experiments, performed at the L"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.12145","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.12145/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T10:07:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3XfVCiw5megtcaKvO4TEEwph1ahUpJBNFomS9k5w2U+1HzyJgrewUhRiV5k94+h/xbmtz7VrfttVDMxzTR1YCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T01:04:10.413140Z"},"content_sha256":"5f43aa805dac5f31c830b37ef425218a53006018cc731c980959279c533a0648","schema_version":"1.0","event_id":"sha256:5f43aa805dac5f31c830b37ef425218a53006018cc731c980959279c533a0648"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L3P225NPGPN3WRI6FYWXQHT2DC/bundle.json","state_url":"https://pith.science/pith/L3P225NPGPN3WRI6FYWXQHT2DC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L3P225NPGPN3WRI6FYWXQHT2DC/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":"2026-08-22T01:04:10Z","links":{"resolver":"https://pith.science/pith/L3P225NPGPN3WRI6FYWXQHT2DC","bundle":"https://pith.science/pith/L3P225NPGPN3WRI6FYWXQHT2DC/bundle.json","state":"https://pith.science/pith/L3P225NPGPN3WRI6FYWXQHT2DC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L3P225NPGPN3WRI6FYWXQHT2DC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:L3P225NPGPN3WRI6FYWXQHT2DC","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":"5977c5d80caad056902d6f53c1c143d592531d3bcb609f5bcc36ac185a2ef74c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-11-27T13:29:02Z","title_canon_sha256":"ab16815e90752243b833b0e4d515ae046cc558c9dba7d16454303377160a3b94"},"schema_version":"1.0","source":{"id":"1911.12145","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.12145","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"arxiv_version","alias_value":"1911.12145v2","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.12145","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_12","alias_value":"L3P225NPGPN3","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_16","alias_value":"L3P225NPGPN3WRI6","created_at":"2026-07-05T10:07:36Z"},{"alias_kind":"pith_short_8","alias_value":"L3P225NP","created_at":"2026-07-05T10:07:36Z"}],"graph_snapshots":[{"event_id":"sha256:5f43aa805dac5f31c830b37ef425218a53006018cc731c980959279c533a0648","target":"graph","created_at":"2026-07-05T10:07:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.12145/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate from first-principles theory and experiment the generation of phonons on picosecond timescales and the relaxation of carriers in multiple conduction band valleys of photo-excited Ge by inter-valley electron-phonon scattering. We provide a full description of the phonon and electron relaxation dynamics without adjustable parameters. Simulations of the time-evolution of phonon populations, based on first-principles band structure and electron-phonon and phonon-phonon matrix elements, are compared with data from time-resolved x-ray diffuse scattering experiments, performed at the L","authors_text":"D. Reis, \\'E. D. Murray, F. Murphy-Armando, I. Savi\\'c, M. Trigo, S. Fahy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-11-27T13:29:02Z","title":"Evolution of non-thermal phonon and electron populations in photo-excited germanium on picosecond timescales"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.12145","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":"sha256:184b2118458ddeee8d5c5cc1ed203a6ca9ba372a4bf723ffef50eba3bdff9128","target":"record","created_at":"2026-07-05T10:07:36Z","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":"5977c5d80caad056902d6f53c1c143d592531d3bcb609f5bcc36ac185a2ef74c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-11-27T13:29:02Z","title_canon_sha256":"ab16815e90752243b833b0e4d515ae046cc558c9dba7d16454303377160a3b94"},"schema_version":"1.0","source":{"id":"1911.12145","kind":"arxiv","version":2}},"canonical_sha256":"5edfad75af33dbbb451e2e2d781e7a1885fbdb0c93bb7f2ba14a6332dc9286b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5edfad75af33dbbb451e2e2d781e7a1885fbdb0c93bb7f2ba14a6332dc9286b2","first_computed_at":"2026-07-05T10:07:36.568676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:07:36.568676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fyUKM2WMvuEB7KY0Edy2sy8ENFDBNntwmEvmhIR+vfZ3d9GWLbOMUuU3S37o5yNwxtyQWrJA0nWTw82ewuE3AQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:07:36.569245Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.12145","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:184b2118458ddeee8d5c5cc1ed203a6ca9ba372a4bf723ffef50eba3bdff9128","sha256:5f43aa805dac5f31c830b37ef425218a53006018cc731c980959279c533a0648"],"state_sha256":"e6b8697ab7c402b58a886d78d2470ba5ca114e21f7adaa089d637a2f9315eab3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lWVMuDTrCowshRg/qcBjanE6NhK/konRcvQqwEtCg01bMslKegxyLS5NufKvDnxSl5ZgiD+RyA4lnvL03MynAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T01:04:10.418127Z","bundle_sha256":"5ed6b7fc1c039d13bd6cfc09562642a2f077aeb33d596ad2a2b1d71222353204"}}