{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6UXALEN6I5R7DJ5SQZXLWAJR2K","short_pith_number":"pith:6UXALEN6","canonical_record":{"source":{"id":"2607.02258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-02T14:46:01Z","cross_cats_sorted":["cond-mat.other","physics.atom-ph"],"title_canon_sha256":"c9a3ea5574365f8b3521f0548b9a06459827cc138d9017ffc3fc94dad21368f1","abstract_canon_sha256":"39fa734684b6cbc4ba9236b41ee9c348e3419573f52b2489ae4ecdb902a5b68a"},"schema_version":"1.0"},"canonical_sha256":"f52e0591be4763f1a7b2866ebb0131d2a833cf68f414a1e31b7ba67e3257ccdd","source":{"kind":"arxiv","id":"2607.02258","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02258","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02258v1","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02258","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_12","alias_value":"6UXALEN6I5R7","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_16","alias_value":"6UXALEN6I5R7DJ5S","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_8","alias_value":"6UXALEN6","created_at":"2026-07-03T01:17:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6UXALEN6I5R7DJ5SQZXLWAJR2K","target":"record","payload":{"canonical_record":{"source":{"id":"2607.02258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-02T14:46:01Z","cross_cats_sorted":["cond-mat.other","physics.atom-ph"],"title_canon_sha256":"c9a3ea5574365f8b3521f0548b9a06459827cc138d9017ffc3fc94dad21368f1","abstract_canon_sha256":"39fa734684b6cbc4ba9236b41ee9c348e3419573f52b2489ae4ecdb902a5b68a"},"schema_version":"1.0"},"canonical_sha256":"f52e0591be4763f1a7b2866ebb0131d2a833cf68f414a1e31b7ba67e3257ccdd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-03T01:17:46.792761Z","signature_b64":"WEDrLGzMeKlTVGo9T/ugrieTHqlwn6Dqu4MLumJGgQBXJGGm5z0QNLhmSx1RhYBBZ+in0CIkuJ1TwGyq5T5lDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f52e0591be4763f1a7b2866ebb0131d2a833cf68f414a1e31b7ba67e3257ccdd","last_reissued_at":"2026-07-03T01:17:46.792348Z","signature_status":"signed_v1","first_computed_at":"2026-07-03T01:17:46.792348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.02258","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":"2026-07-03T01:17:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rkq0bOtkbWmATo8J61/o1voLCvoi45WHDVsrBDV/AMVTU1ld15gxgQgjxbCSk84z2I8CNRWS0IiPYC+ckJ32Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:19:58.861576Z"},"content_sha256":"1eb99f65e5cb7ad93d37c60a88cf75adfe5a35375b26ad8ab76a5b9edc626c69","schema_version":"1.0","event_id":"sha256:1eb99f65e5cb7ad93d37c60a88cf75adfe5a35375b26ad8ab76a5b9edc626c69"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6UXALEN6I5R7DJ5SQZXLWAJR2K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A transition-metal qubit in diamond with all-optical control and millisecond quantum memory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other","physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"D. J. Twitchen, I.M. Morris, J. Meijer, J. N. Becker, L. Crooks, S. Pezzagna, S. S. Nicley, T. Alberth, T. L\\\"uhmann","submitted_at":"2026-07-02T14:46:01Z","abstract_excerpt":"Quantum networks require qubits that combine efficient optical access, coherent control, and long-lived quantum memory, but realizing all three in one scalable platform remains a central bottleneck. Diamond color centers are leading candidates, yet widely studied defects retain tradeoffs among these capabilities. Here, we show that transition-metal defects in diamond provide a distinct route beyond these platforms by combining spin-orbit protected ground-state coherence, all-optical control, and near-infrared emission. Using a single nickel-vacancy (NiV$^-$), we demonstrate an all-optically co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02258","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/2607.02258/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":"2026-07-03T01:17:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XYzFIJryhXTtPpR8qIIPxwnmtdpFooWLLFVIVKCMXUhkSYE7MUXoW5FNzFxnnmbXVPj/+WNd3SbdMkMxaNboAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:19:58.861948Z"},"content_sha256":"f2d35f8f46d9fd9d1c83205bb69bf03d4ff9a7651c00e312ea26d127478b7389","schema_version":"1.0","event_id":"sha256:f2d35f8f46d9fd9d1c83205bb69bf03d4ff9a7651c00e312ea26d127478b7389"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/bundle.json","state_url":"https://pith.science/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/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":"2026-07-07T12:19:58Z","links":{"resolver":"https://pith.science/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K","bundle":"https://pith.science/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/bundle.json","state":"https://pith.science/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6UXALEN6I5R7DJ5SQZXLWAJR2K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6UXALEN6I5R7DJ5SQZXLWAJR2K","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":"39fa734684b6cbc4ba9236b41ee9c348e3419573f52b2489ae4ecdb902a5b68a","cross_cats_sorted":["cond-mat.other","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-02T14:46:01Z","title_canon_sha256":"c9a3ea5574365f8b3521f0548b9a06459827cc138d9017ffc3fc94dad21368f1"},"schema_version":"1.0","source":{"id":"2607.02258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.02258","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"arxiv_version","alias_value":"2607.02258v1","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.02258","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_12","alias_value":"6UXALEN6I5R7","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_16","alias_value":"6UXALEN6I5R7DJ5S","created_at":"2026-07-03T01:17:46Z"},{"alias_kind":"pith_short_8","alias_value":"6UXALEN6","created_at":"2026-07-03T01:17:46Z"}],"graph_snapshots":[{"event_id":"sha256:f2d35f8f46d9fd9d1c83205bb69bf03d4ff9a7651c00e312ea26d127478b7389","target":"graph","created_at":"2026-07-03T01:17:46Z","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/2607.02258/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum networks require qubits that combine efficient optical access, coherent control, and long-lived quantum memory, but realizing all three in one scalable platform remains a central bottleneck. Diamond color centers are leading candidates, yet widely studied defects retain tradeoffs among these capabilities. Here, we show that transition-metal defects in diamond provide a distinct route beyond these platforms by combining spin-orbit protected ground-state coherence, all-optical control, and near-infrared emission. Using a single nickel-vacancy (NiV$^-$), we demonstrate an all-optically co","authors_text":"D. J. Twitchen, I.M. Morris, J. Meijer, J. N. Becker, L. Crooks, S. Pezzagna, S. S. Nicley, T. Alberth, T. L\\\"uhmann","cross_cats":["cond-mat.other","physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-02T14:46:01Z","title":"A transition-metal qubit in diamond with all-optical control and millisecond quantum memory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.02258","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":"sha256:1eb99f65e5cb7ad93d37c60a88cf75adfe5a35375b26ad8ab76a5b9edc626c69","target":"record","created_at":"2026-07-03T01:17:46Z","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":"39fa734684b6cbc4ba9236b41ee9c348e3419573f52b2489ae4ecdb902a5b68a","cross_cats_sorted":["cond-mat.other","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-07-02T14:46:01Z","title_canon_sha256":"c9a3ea5574365f8b3521f0548b9a06459827cc138d9017ffc3fc94dad21368f1"},"schema_version":"1.0","source":{"id":"2607.02258","kind":"arxiv","version":1}},"canonical_sha256":"f52e0591be4763f1a7b2866ebb0131d2a833cf68f414a1e31b7ba67e3257ccdd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f52e0591be4763f1a7b2866ebb0131d2a833cf68f414a1e31b7ba67e3257ccdd","first_computed_at":"2026-07-03T01:17:46.792348Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-03T01:17:46.792348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WEDrLGzMeKlTVGo9T/ugrieTHqlwn6Dqu4MLumJGgQBXJGGm5z0QNLhmSx1RhYBBZ+in0CIkuJ1TwGyq5T5lDw==","signature_status":"signed_v1","signed_at":"2026-07-03T01:17:46.792761Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.02258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1eb99f65e5cb7ad93d37c60a88cf75adfe5a35375b26ad8ab76a5b9edc626c69","sha256:f2d35f8f46d9fd9d1c83205bb69bf03d4ff9a7651c00e312ea26d127478b7389"],"state_sha256":"eefa5bd33850ea919acdf16347b6c53d46027214d607a7bd8f701b938f9028db"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NZNDU4M3cLKDTVg8RiNDuryRji3YF5Lhj4tFIxnb4CnV2B43ZdARCzhP8o8HmwP9ZC58kh3D8iim1024f6g+Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T12:19:58.863935Z","bundle_sha256":"45190dbc54e70cbf18acb227ff34e9b323bf42f9547d748ae3a832101bad0458"}}