{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PBNPJV6Y26PHPEIPUDSRAQAUHO","short_pith_number":"pith:PBNPJV6Y","canonical_record":{"source":{"id":"2106.03413","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-07T08:25:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"64b543d15365c7d2ffe7b0571a1578dafa1d90eafac100e522526fc0e3746cac","abstract_canon_sha256":"bbdb7aafde612467b65828c119650d58f389db2768455332b12f6f315ee071f7"},"schema_version":"1.0"},"canonical_sha256":"785af4d7d8d79e77910fa0e51040143b84ef310c40b71e36f054b7c5943c0a97","source":{"kind":"arxiv","id":"2106.03413","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.03413","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"arxiv_version","alias_value":"2106.03413v1","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.03413","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_12","alias_value":"PBNPJV6Y26PH","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_16","alias_value":"PBNPJV6Y26PHPEIP","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_8","alias_value":"PBNPJV6Y","created_at":"2026-07-05T02:46:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PBNPJV6Y26PHPEIPUDSRAQAUHO","target":"record","payload":{"canonical_record":{"source":{"id":"2106.03413","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-07T08:25:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"64b543d15365c7d2ffe7b0571a1578dafa1d90eafac100e522526fc0e3746cac","abstract_canon_sha256":"bbdb7aafde612467b65828c119650d58f389db2768455332b12f6f315ee071f7"},"schema_version":"1.0"},"canonical_sha256":"785af4d7d8d79e77910fa0e51040143b84ef310c40b71e36f054b7c5943c0a97","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:46:49.237006Z","signature_b64":"OY24BVuHYuGY+mk3gzEuMRldF+up/gn2D+xhauP/zlwHs5ogsyoBF1rBNBXkHhjttvlZxSHyBUMJP9dOevwMDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"785af4d7d8d79e77910fa0e51040143b84ef310c40b71e36f054b7c5943c0a97","last_reissued_at":"2026-07-05T02:46:49.236639Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:46:49.236639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.03413","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":"2026-07-05T02:46:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p8aAh3gLa7KQ4aFOWz9IJx5kzcKjEfE6gYS0+cd5GH/i7+nJpxPpQXcTWQP6q4MMALVh1Ld5c4U8gGvTLvqKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:21:53.553291Z"},"content_sha256":"e5888e3c436377c505d748e98cc0785580b85710fd171874ebdc9675b6feb216","schema_version":"1.0","event_id":"sha256:e5888e3c436377c505d748e98cc0785580b85710fd171874ebdc9675b6feb216"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PBNPJV6Y26PHPEIPUDSRAQAUHO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-Temperature Spectroscopic Investigation of Lead-Vacancy Centers in Diamond Fabricated by High-Pressure and High-Temperature Treatment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Mutsuko Hatano, Peng Wang, Takashi Taniguchi, Takayuki Iwasaki, Yoshiyuki Miyamoto","submitted_at":"2021-06-07T08:25:25Z","abstract_excerpt":"We report the optical observation of lead-vacancy (PbV) centers in diamond fabricated by Pb ion implantation and subsequent high-temperature annealing (2100 {\\deg}C) under high pressure (7.7 GPa). Their optical properties were characterized by photoluminescence at varying temperatures down to 5.7 K. We observed intense emission peaks at 550 and 554 nm with a large splitting of approximately 3900 GHz. The two lines are thought to correspond to the zero phonon line (ZPL) of PbV centers with split ground and excited states. A cubic trend of the ZPL width was observed while varying temperature. We"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.03413","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/2106.03413/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":"2026-07-05T02:46:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oQe+0ZX1B9JdfPP1li2vDzvTnfqEANa9b9iFdqtq76IDKTgYphr0n0McmVRqD9Czox5hn26QpmsxfIWRSezzDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:21:53.553817Z"},"content_sha256":"71f0cf6e4f199ad9f917d884aeb7d0d77ae96c298cc7c0c23a8b9182896ce312","schema_version":"1.0","event_id":"sha256:71f0cf6e4f199ad9f917d884aeb7d0d77ae96c298cc7c0c23a8b9182896ce312"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/bundle.json","state_url":"https://pith.science/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/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":"2026-08-18T07:21:53Z","links":{"resolver":"https://pith.science/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO","bundle":"https://pith.science/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/bundle.json","state":"https://pith.science/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PBNPJV6Y26PHPEIPUDSRAQAUHO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PBNPJV6Y26PHPEIPUDSRAQAUHO","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":"bbdb7aafde612467b65828c119650d58f389db2768455332b12f6f315ee071f7","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-07T08:25:25Z","title_canon_sha256":"64b543d15365c7d2ffe7b0571a1578dafa1d90eafac100e522526fc0e3746cac"},"schema_version":"1.0","source":{"id":"2106.03413","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.03413","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"arxiv_version","alias_value":"2106.03413v1","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.03413","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_12","alias_value":"PBNPJV6Y26PH","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_16","alias_value":"PBNPJV6Y26PHPEIP","created_at":"2026-07-05T02:46:49Z"},{"alias_kind":"pith_short_8","alias_value":"PBNPJV6Y","created_at":"2026-07-05T02:46:49Z"}],"graph_snapshots":[{"event_id":"sha256:71f0cf6e4f199ad9f917d884aeb7d0d77ae96c298cc7c0c23a8b9182896ce312","target":"graph","created_at":"2026-07-05T02:46:49Z","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/2106.03413/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the optical observation of lead-vacancy (PbV) centers in diamond fabricated by Pb ion implantation and subsequent high-temperature annealing (2100 {\\deg}C) under high pressure (7.7 GPa). Their optical properties were characterized by photoluminescence at varying temperatures down to 5.7 K. We observed intense emission peaks at 550 and 554 nm with a large splitting of approximately 3900 GHz. The two lines are thought to correspond to the zero phonon line (ZPL) of PbV centers with split ground and excited states. A cubic trend of the ZPL width was observed while varying temperature. We","authors_text":"Mutsuko Hatano, Peng Wang, Takashi Taniguchi, Takayuki Iwasaki, Yoshiyuki Miyamoto","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-07T08:25:25Z","title":"Low-Temperature Spectroscopic Investigation of Lead-Vacancy Centers in Diamond Fabricated by High-Pressure and High-Temperature Treatment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.03413","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:e5888e3c436377c505d748e98cc0785580b85710fd171874ebdc9675b6feb216","target":"record","created_at":"2026-07-05T02:46:49Z","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":"bbdb7aafde612467b65828c119650d58f389db2768455332b12f6f315ee071f7","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-07T08:25:25Z","title_canon_sha256":"64b543d15365c7d2ffe7b0571a1578dafa1d90eafac100e522526fc0e3746cac"},"schema_version":"1.0","source":{"id":"2106.03413","kind":"arxiv","version":1}},"canonical_sha256":"785af4d7d8d79e77910fa0e51040143b84ef310c40b71e36f054b7c5943c0a97","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"785af4d7d8d79e77910fa0e51040143b84ef310c40b71e36f054b7c5943c0a97","first_computed_at":"2026-07-05T02:46:49.236639Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:46:49.236639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OY24BVuHYuGY+mk3gzEuMRldF+up/gn2D+xhauP/zlwHs5ogsyoBF1rBNBXkHhjttvlZxSHyBUMJP9dOevwMDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:46:49.237006Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.03413","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5888e3c436377c505d748e98cc0785580b85710fd171874ebdc9675b6feb216","sha256:71f0cf6e4f199ad9f917d884aeb7d0d77ae96c298cc7c0c23a8b9182896ce312"],"state_sha256":"1763acc1b76c48b3a5d0a7db81e6210bb03cc28851cc840af6698398e649ff0a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CAwDQEURAeHJOuBNb+Ld6+BPlvyxn3xpB+y2ehbPwW/1CRpy/Qbts2CdDmApPTra4d6JY4d+VonNhSHQHU+uCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T07:21:53.558205Z","bundle_sha256":"99cadbd3b0edc5b3708619a943f7ef7540ad20781cb9bd0bc75489231a85253a"}}