{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:ASWHG2TOOBHHQUFAUXAAZLCWE5","short_pith_number":"pith:ASWHG2TO","canonical_record":{"source":{"id":"2501.16407","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-27T17:06:38Z","cross_cats_sorted":[],"title_canon_sha256":"436165f1f6f331cf9478f7b48108bcb4ac2e10cd3621ee4e247416ec9423b505","abstract_canon_sha256":"4c000687d91885e15abb9e978300c8e727447b808c4520b3d0bfb68bb23341fe"},"schema_version":"1.0"},"canonical_sha256":"04ac736a6e704e7850a0a5c00cac56275cad2f1970034b9aa61e04eb36abe7d7","source":{"kind":"arxiv","id":"2501.16407","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.16407","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"arxiv_version","alias_value":"2501.16407v2","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.16407","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_12","alias_value":"ASWHG2TOOBHH","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_16","alias_value":"ASWHG2TOOBHHQUFA","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_8","alias_value":"ASWHG2TO","created_at":"2026-07-05T10:48:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:ASWHG2TOOBHHQUFAUXAAZLCWE5","target":"record","payload":{"canonical_record":{"source":{"id":"2501.16407","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-27T17:06:38Z","cross_cats_sorted":[],"title_canon_sha256":"436165f1f6f331cf9478f7b48108bcb4ac2e10cd3621ee4e247416ec9423b505","abstract_canon_sha256":"4c000687d91885e15abb9e978300c8e727447b808c4520b3d0bfb68bb23341fe"},"schema_version":"1.0"},"canonical_sha256":"04ac736a6e704e7850a0a5c00cac56275cad2f1970034b9aa61e04eb36abe7d7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:48:24.679559Z","signature_b64":"NLTc9317/neRr31fwnwCKI3PtGJ13gqfGNhZ8phcq5l5vl7Y5bVb7Uvq1bFnFr5GfwVl/zjrjBHKvy8kmSzBAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"04ac736a6e704e7850a0a5c00cac56275cad2f1970034b9aa61e04eb36abe7d7","last_reissued_at":"2026-07-05T10:48:24.679053Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:48:24.679053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.16407","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":"2026-07-05T10:48:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"98v2ZHwqqfO45yfiaJz2R/zaUsIM2DfW6y+Ta5wfHeOdZDDIHZYxnqhDf1fMlriCCmm/LsdTh+MZf04FwbSYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T03:12:33.325392Z"},"content_sha256":"4dcc2a06edc55332079905f1e714e953c8cde18a9e3ba29505983dcbeebd422f","schema_version":"1.0","event_id":"sha256:4dcc2a06edc55332079905f1e714e953c8cde18a9e3ba29505983dcbeebd422f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:ASWHG2TOOBHHQUFAUXAAZLCWE5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical coherence and hyperfine structure of the 7F0-5D0 transition in EuCaWO4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Fudong Wang, Manjin Zhong, Miaomiao Ren, Mucheng Guo, Shuping Liu, Wanting Xiao, Weiye Sun, Xiantong An, Zhehao Xu","submitted_at":"2025-01-27T17:06:38Z","abstract_excerpt":"Rare-earth ions doped in crystals with low nuclear-spin densities are highly promising candidates for quantum technology applications. In this study, we investigated the spectroscopic properties of the 7F0 - 5 D0 optical and the hyperfine transitions of Eu3+ ions in a CaWO4 crystal, where the nuclear spin arises solely from the 183W isotope, with a natural abundance of 14%. At a temperature of 3 K, we experimentally identified four distinct crystal field environments for Eu3+ ions in a 0.1 at.% Eu3+ doped CaWO4 crystal. The optical coherence properties of Eu3+ ions in these environments were c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.16407","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/2501.16407/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":"2026-07-05T10:48:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kji2/+27Nl0MttRkXt/Ko7Qu8TiymY9sl0uhegPYA3AwYdAI+3zT2RPjz7MYhM6JxPR6Wl8OF0BtnMdYCUVgBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T03:12:33.325756Z"},"content_sha256":"54d9ebe25fbb83f6eec7b77fd2e0b68addc7b75590b98a14cb114fa73db20c78","schema_version":"1.0","event_id":"sha256:54d9ebe25fbb83f6eec7b77fd2e0b68addc7b75590b98a14cb114fa73db20c78"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/bundle.json","state_url":"https://pith.science/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/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":"2026-07-09T03:12:33Z","links":{"resolver":"https://pith.science/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5","bundle":"https://pith.science/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/bundle.json","state":"https://pith.science/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ASWHG2TOOBHHQUFAUXAAZLCWE5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ASWHG2TOOBHHQUFAUXAAZLCWE5","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":"4c000687d91885e15abb9e978300c8e727447b808c4520b3d0bfb68bb23341fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-27T17:06:38Z","title_canon_sha256":"436165f1f6f331cf9478f7b48108bcb4ac2e10cd3621ee4e247416ec9423b505"},"schema_version":"1.0","source":{"id":"2501.16407","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.16407","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"arxiv_version","alias_value":"2501.16407v2","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.16407","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_12","alias_value":"ASWHG2TOOBHH","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_16","alias_value":"ASWHG2TOOBHHQUFA","created_at":"2026-07-05T10:48:24Z"},{"alias_kind":"pith_short_8","alias_value":"ASWHG2TO","created_at":"2026-07-05T10:48:24Z"}],"graph_snapshots":[{"event_id":"sha256:54d9ebe25fbb83f6eec7b77fd2e0b68addc7b75590b98a14cb114fa73db20c78","target":"graph","created_at":"2026-07-05T10:48:24Z","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/2501.16407/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Rare-earth ions doped in crystals with low nuclear-spin densities are highly promising candidates for quantum technology applications. In this study, we investigated the spectroscopic properties of the 7F0 - 5 D0 optical and the hyperfine transitions of Eu3+ ions in a CaWO4 crystal, where the nuclear spin arises solely from the 183W isotope, with a natural abundance of 14%. At a temperature of 3 K, we experimentally identified four distinct crystal field environments for Eu3+ ions in a 0.1 at.% Eu3+ doped CaWO4 crystal. The optical coherence properties of Eu3+ ions in these environments were c","authors_text":"Fudong Wang, Manjin Zhong, Miaomiao Ren, Mucheng Guo, Shuping Liu, Wanting Xiao, Weiye Sun, Xiantong An, Zhehao Xu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-27T17:06:38Z","title":"Optical coherence and hyperfine structure of the 7F0-5D0 transition in EuCaWO4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.16407","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":"sha256:4dcc2a06edc55332079905f1e714e953c8cde18a9e3ba29505983dcbeebd422f","target":"record","created_at":"2026-07-05T10:48:24Z","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":"4c000687d91885e15abb9e978300c8e727447b808c4520b3d0bfb68bb23341fe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-01-27T17:06:38Z","title_canon_sha256":"436165f1f6f331cf9478f7b48108bcb4ac2e10cd3621ee4e247416ec9423b505"},"schema_version":"1.0","source":{"id":"2501.16407","kind":"arxiv","version":2}},"canonical_sha256":"04ac736a6e704e7850a0a5c00cac56275cad2f1970034b9aa61e04eb36abe7d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"04ac736a6e704e7850a0a5c00cac56275cad2f1970034b9aa61e04eb36abe7d7","first_computed_at":"2026-07-05T10:48:24.679053Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:48:24.679053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NLTc9317/neRr31fwnwCKI3PtGJ13gqfGNhZ8phcq5l5vl7Y5bVb7Uvq1bFnFr5GfwVl/zjrjBHKvy8kmSzBAA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:48:24.679559Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.16407","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4dcc2a06edc55332079905f1e714e953c8cde18a9e3ba29505983dcbeebd422f","sha256:54d9ebe25fbb83f6eec7b77fd2e0b68addc7b75590b98a14cb114fa73db20c78"],"state_sha256":"0d55d58c0666c5a5ee7aeed947189ca84160c3f2b524f9a82f00a889b7dd9eda"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vdi+dOV4VuhXBto3PhX6TR296IwVlkeM3XSrfdE54hKkxSSSE2B0eaO/iLz9DooQ6u65f2n5Os0Es/qvoow7Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T03:12:33.327714Z","bundle_sha256":"46e6e38178d1d0ed28b59a694d2bd93aca7de4a5b7236759cfe1b4c63f6993c3"}}