{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OCDWIIMVALLT7ASK7ZIQIEOK5S","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":"dca441fb62955b983991088635214b7313c46d0598e936efce885959eda56851","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-11-19T00:33:58Z","title_canon_sha256":"804aba573f0e4ee9260a6f3f1fd5196b1e985ef8c88caa7846dada7cabeda92d"},"schema_version":"1.0","source":{"id":"1811.07436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.07436","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"arxiv_version","alias_value":"1811.07436v1","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.07436","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"pith_short_12","alias_value":"OCDWIIMVALLT","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OCDWIIMVALLT7ASK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OCDWIIMV","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:1452d549a223e7b21a490e19215f6663d404784e1fd92da4d6a5519f6bbd7d85","target":"graph","created_at":"2026-05-17T23:43:04Z","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"},"paper":{"abstract_excerpt":"Optical detection of spin state has been widely used for the solid state spin qubit in the application of quantum information processing. The signal contrast determines the accuracy of quantum state manipulation, sensitivity of quantum sensing and resolution of quantum imaging. Here, we demonstrated a time-gated fluorescence detection method for enhancing the spin state signal contrast of nitrogen vacancy (NV) center in diamond. By adjusting the delay between time gate and the excitation laser pulse, we improved both the signal contrast and signal-to-noise ratio for NV spin detection. An enhan","authors_text":"Bo Du, Deng-Feng Li, Fang-Wen Sun, Guang-Can Guo, Shen Li, Xiang-Dong Chen, Yang Dong, Yu Zheng","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-11-19T00:33:58Z","title":"High contrast quantum imaging with time-gated fluorescence detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07436","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":"sha256:948ff8e6639ea45867a5c5d12e09a9a813e9fb3f69df405810626b1804a146d9","target":"record","created_at":"2026-05-17T23:43:04Z","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":"dca441fb62955b983991088635214b7313c46d0598e936efce885959eda56851","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-11-19T00:33:58Z","title_canon_sha256":"804aba573f0e4ee9260a6f3f1fd5196b1e985ef8c88caa7846dada7cabeda92d"},"schema_version":"1.0","source":{"id":"1811.07436","kind":"arxiv","version":1}},"canonical_sha256":"708764219502d73f824afe510411caec96d95d6b9338b24d8abe65dbaee0c1e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"708764219502d73f824afe510411caec96d95d6b9338b24d8abe65dbaee0c1e0","first_computed_at":"2026-05-17T23:43:04.288737Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:04.288737Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v15PJQEn2wlJqoU9DBa7JGosXY3rr96ZcxQCvicYJ8MrPFTSu4Nc/e8OHM86Ow5v/ZHpSW5kpSzJLaQyrZ/PBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:04.289144Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.07436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:948ff8e6639ea45867a5c5d12e09a9a813e9fb3f69df405810626b1804a146d9","sha256:1452d549a223e7b21a490e19215f6663d404784e1fd92da4d6a5519f6bbd7d85"],"state_sha256":"fa07ff480f9fb0c57d5caf78eef27bb13e6fe093490bafc0364e6b0ce04b07c6"}