{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:MONKSE2HAT44MHEWUD2HMDWKHU","short_pith_number":"pith:MONKSE2H","canonical_record":{"source":{"id":"2602.09565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-02-10T09:15:18Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.chem-ph"],"title_canon_sha256":"88c7eb96b6e56ece77c1a6ecabb83b28ca9007aadceaaa2f9cd91da995ff9b07","abstract_canon_sha256":"187fd148387b490db1b91c29200a43f2bbc1b7b0ebd0c143c3c0c0c72a3a9dee"},"schema_version":"1.0"},"canonical_sha256":"639aa9134704f9c61c96a0f4760eca3d24657d75b47aa32bd547a2101873d166","source":{"kind":"arxiv","id":"2602.09565","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.09565","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"arxiv_version","alias_value":"2602.09565v1","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.09565","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_12","alias_value":"MONKSE2HAT44","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_16","alias_value":"MONKSE2HAT44MHEW","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_8","alias_value":"MONKSE2H","created_at":"2026-05-20T00:05:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:MONKSE2HAT44MHEWUD2HMDWKHU","target":"record","payload":{"canonical_record":{"source":{"id":"2602.09565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-02-10T09:15:18Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.chem-ph"],"title_canon_sha256":"88c7eb96b6e56ece77c1a6ecabb83b28ca9007aadceaaa2f9cd91da995ff9b07","abstract_canon_sha256":"187fd148387b490db1b91c29200a43f2bbc1b7b0ebd0c143c3c0c0c72a3a9dee"},"schema_version":"1.0"},"canonical_sha256":"639aa9134704f9c61c96a0f4760eca3d24657d75b47aa32bd547a2101873d166","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:05:41.895388Z","signature_b64":"NMEfhthMSB+s9fGSt7pR1Klgi+AvFyUd/VFehzW2Co4M9JDcrQrccwJTgJCMEYHUg1UcEvhdjosg4WBIqKBgCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"639aa9134704f9c61c96a0f4760eca3d24657d75b47aa32bd547a2101873d166","last_reissued_at":"2026-05-20T00:05:41.894837Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:05:41.894837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.09565","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":"2026-05-20T00:05:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vd5p/scE85iuFvLOLJ/MC4G40lbQQCHgoXt+f2wMqmh7bv/K8pInijeFPIMY4UvXAX2773whw06Q0RHspZVECg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T18:49:36.482892Z"},"content_sha256":"208b1942c1998a5897a4ee66a5ca9f8a8268d7802a0f8cdd4ad022de8538e3d3","schema_version":"1.0","event_id":"sha256:208b1942c1998a5897a4ee66a5ca9f8a8268d7802a0f8cdd4ad022de8538e3d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:MONKSE2HAT44MHEWUD2HMDWKHU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Background-free Tracking of Ultrafast Hole and Electron Dynamics with XUV Transient Grating Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.chem-ph"],"primary_cat":"physics.optics","authors_text":"Kevin Gulu Xiong, Rafael Quintero-Bermudez, Stephen R. Leone, Vincent Eggers","submitted_at":"2026-02-10T09:15:18Z","abstract_excerpt":"Extreme ultraviolet (XUV) transient absorption (TA) and transient reflectivity (TR) spectroscopies enable element-specific insights into attosecond-timescale processes in solids. XUV transient grating spectroscopy (TGS) is an emerging tool that combines the advantages of both absorption and reflectivity while offering intrinsically background-free detection. Here, we implement XUV-TGS by generating a transient grating in germanium solid using two few-cycle near-infrared pulses and probing it with an attosecond XUV pulse, produced via tabletop high-harmonic generation. The spectrally resolved, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.09565","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2602.09565/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":"2026-05-20T00:05:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7q9mNj8Jv1Txj18yLscXEmTXyKEdVnzoUwDFeG9q2hpQS6Kf3s+cPMdNAPS2eZfyyHSYAmmedZ/gKxZD1vmYCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T18:49:36.483285Z"},"content_sha256":"2838d883088afdc7a4f5d89bba6d0d20c7172560bf64e45e57e9f8e2746ceaf0","schema_version":"1.0","event_id":"sha256:2838d883088afdc7a4f5d89bba6d0d20c7172560bf64e45e57e9f8e2746ceaf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MONKSE2HAT44MHEWUD2HMDWKHU/bundle.json","state_url":"https://pith.science/pith/MONKSE2HAT44MHEWUD2HMDWKHU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MONKSE2HAT44MHEWUD2HMDWKHU/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":"2026-06-05T18:49:36Z","links":{"resolver":"https://pith.science/pith/MONKSE2HAT44MHEWUD2HMDWKHU","bundle":"https://pith.science/pith/MONKSE2HAT44MHEWUD2HMDWKHU/bundle.json","state":"https://pith.science/pith/MONKSE2HAT44MHEWUD2HMDWKHU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MONKSE2HAT44MHEWUD2HMDWKHU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:MONKSE2HAT44MHEWUD2HMDWKHU","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":"187fd148387b490db1b91c29200a43f2bbc1b7b0ebd0c143c3c0c0c72a3a9dee","cross_cats_sorted":["cond-mat.mtrl-sci","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-02-10T09:15:18Z","title_canon_sha256":"88c7eb96b6e56ece77c1a6ecabb83b28ca9007aadceaaa2f9cd91da995ff9b07"},"schema_version":"1.0","source":{"id":"2602.09565","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.09565","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"arxiv_version","alias_value":"2602.09565v1","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.09565","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_12","alias_value":"MONKSE2HAT44","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_16","alias_value":"MONKSE2HAT44MHEW","created_at":"2026-05-20T00:05:41Z"},{"alias_kind":"pith_short_8","alias_value":"MONKSE2H","created_at":"2026-05-20T00:05:41Z"}],"graph_snapshots":[{"event_id":"sha256:2838d883088afdc7a4f5d89bba6d0d20c7172560bf64e45e57e9f8e2746ceaf0","target":"graph","created_at":"2026-05-20T00:05:41Z","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/2602.09565/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Extreme ultraviolet (XUV) transient absorption (TA) and transient reflectivity (TR) spectroscopies enable element-specific insights into attosecond-timescale processes in solids. XUV transient grating spectroscopy (TGS) is an emerging tool that combines the advantages of both absorption and reflectivity while offering intrinsically background-free detection. Here, we implement XUV-TGS by generating a transient grating in germanium solid using two few-cycle near-infrared pulses and probing it with an attosecond XUV pulse, produced via tabletop high-harmonic generation. The spectrally resolved, ","authors_text":"Kevin Gulu Xiong, Rafael Quintero-Bermudez, Stephen R. Leone, Vincent Eggers","cross_cats":["cond-mat.mtrl-sci","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-02-10T09:15:18Z","title":"Background-free Tracking of Ultrafast Hole and Electron Dynamics with XUV Transient Grating Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.09565","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":"sha256:208b1942c1998a5897a4ee66a5ca9f8a8268d7802a0f8cdd4ad022de8538e3d3","target":"record","created_at":"2026-05-20T00:05:41Z","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":"187fd148387b490db1b91c29200a43f2bbc1b7b0ebd0c143c3c0c0c72a3a9dee","cross_cats_sorted":["cond-mat.mtrl-sci","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-02-10T09:15:18Z","title_canon_sha256":"88c7eb96b6e56ece77c1a6ecabb83b28ca9007aadceaaa2f9cd91da995ff9b07"},"schema_version":"1.0","source":{"id":"2602.09565","kind":"arxiv","version":1}},"canonical_sha256":"639aa9134704f9c61c96a0f4760eca3d24657d75b47aa32bd547a2101873d166","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"639aa9134704f9c61c96a0f4760eca3d24657d75b47aa32bd547a2101873d166","first_computed_at":"2026-05-20T00:05:41.894837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:05:41.894837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NMEfhthMSB+s9fGSt7pR1Klgi+AvFyUd/VFehzW2Co4M9JDcrQrccwJTgJCMEYHUg1UcEvhdjosg4WBIqKBgCQ==","signature_status":"signed_v1","signed_at":"2026-05-20T00:05:41.895388Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.09565","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:208b1942c1998a5897a4ee66a5ca9f8a8268d7802a0f8cdd4ad022de8538e3d3","sha256:2838d883088afdc7a4f5d89bba6d0d20c7172560bf64e45e57e9f8e2746ceaf0"],"state_sha256":"086b0b8b632a97763e661a2078da7fe1b1e618e6c6e0d92f2efe14e0d66e573d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xK/N8W0INDZhx17/Sz1QXFup2VmUoCAOGUVwgbudCpAEZ0m1XBc0wwUtExBa8M+T92rdmfLaybKZAGlahiZuCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T18:49:36.486070Z","bundle_sha256":"8e6de35569b5e1dd28e3ffe0f2671a83bd2dc6834156d8e2359a8e55acc539ad"}}