{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:GAQPSAIN3FM3YKKS67MHUP55GK","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":"750a012b73b7a68e6636f3f1b2b0759a3cd85e7d0ee1254466131f299a9a2e3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T01:30:12Z","title_canon_sha256":"5f1447ebf887899d57a175b5d3cf398aa3be3dffa94796fb279d7c47e7180eaf"},"schema_version":"1.0","source":{"id":"1912.06284","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.06284","created_at":"2026-07-05T00:25:59Z"},{"alias_kind":"arxiv_version","alias_value":"1912.06284v1","created_at":"2026-07-05T00:25:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.06284","created_at":"2026-07-05T00:25:59Z"},{"alias_kind":"pith_short_12","alias_value":"GAQPSAIN3FM3","created_at":"2026-07-05T00:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GAQPSAIN3FM3YKKS","created_at":"2026-07-05T00:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GAQPSAIN","created_at":"2026-07-05T00:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:d26b2d1ffd0d2567e45867970e8f6e8b7f67c3a7d3da2899c5ad765411cf25fa","target":"graph","created_at":"2026-07-05T00:25:59Z","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/1912.06284/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The nitrogen-vacancy (N-V) center in diamond is a widely-used platform for quantum information processing and metrology. The electron-spin state of N-V center could be initialized and readout optically, and manipulated by resonate microwave fields. In this work, we analyze the dependence of electron-spin initialization on widths of laser pulses. We build a numerical model to simulate this process and verify the simulation results in experiment. Both simulations and experiments reveal a fact that shorter laser pulses are helpful to the electron-spin polarization. We therefore propose to use ext","authors_text":"Bing Chen, Dawei Lu, Feifei Zhou, Jiangfeng Du, Nanyang Xu, Tengteng Xing, Ya Wang, Yumeng Song, Yu Tian, Zhiyi Hu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T01:30:12Z","title":"Pulse-width-induced polarization enhancement of optically-pumped N-V electron spin in diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.06284","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":"sha256:103abd6ed7b29b36f0f0ad8417c57f83508b78da0df1679cc1f0813e2fff0836","target":"record","created_at":"2026-07-05T00:25:59Z","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":"750a012b73b7a68e6636f3f1b2b0759a3cd85e7d0ee1254466131f299a9a2e3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T01:30:12Z","title_canon_sha256":"5f1447ebf887899d57a175b5d3cf398aa3be3dffa94796fb279d7c47e7180eaf"},"schema_version":"1.0","source":{"id":"1912.06284","kind":"arxiv","version":1}},"canonical_sha256":"3020f9010dd959bc2952f7d87a3fbd32a14e456a6638ba868a06277501d81351","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3020f9010dd959bc2952f7d87a3fbd32a14e456a6638ba868a06277501d81351","first_computed_at":"2026-07-05T00:25:59.062281Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:25:59.062281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5KdILi4SC2Hy1JSpxYyCnRimFowF+ZxSwF5BMr2AUPErP416xZtXu4Tm/2zpa7tAbc1N3szb0/Kb1EecSyHjBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:25:59.062718Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.06284","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:103abd6ed7b29b36f0f0ad8417c57f83508b78da0df1679cc1f0813e2fff0836","sha256:d26b2d1ffd0d2567e45867970e8f6e8b7f67c3a7d3da2899c5ad765411cf25fa"],"state_sha256":"8f285955402ee1fe4c43be6177a77fe87873be41df09150f15d025391429bdf8"}