{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:BTL6VJFVWMT7MVU3NQ727E2SVE","short_pith_number":"pith:BTL6VJFV","canonical_record":{"source":{"id":"1108.2775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-13T08:30:12Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"75391cece0c813a7a6934c2482df99fcfefbf3ed9173c18b08132e08a91bbc51","abstract_canon_sha256":"03fc8caded6b5ba79334303e31dc47d54ae821e8b11fc7aeebce5c08fa7087ba"},"schema_version":"1.0"},"canonical_sha256":"0cd7eaa4b5b327f6569b6c3faf9352a93c78b26bdd1f6bc86dac185a6f62e7b2","source":{"kind":"arxiv","id":"1108.2775","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.2775","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"arxiv_version","alias_value":"1108.2775v1","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.2775","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"pith_short_12","alias_value":"BTL6VJFVWMT7","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BTL6VJFVWMT7MVU3","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BTL6VJFV","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:BTL6VJFVWMT7MVU3NQ727E2SVE","target":"record","payload":{"canonical_record":{"source":{"id":"1108.2775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-13T08:30:12Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"75391cece0c813a7a6934c2482df99fcfefbf3ed9173c18b08132e08a91bbc51","abstract_canon_sha256":"03fc8caded6b5ba79334303e31dc47d54ae821e8b11fc7aeebce5c08fa7087ba"},"schema_version":"1.0"},"canonical_sha256":"0cd7eaa4b5b327f6569b6c3faf9352a93c78b26bdd1f6bc86dac185a6f62e7b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:54.334454Z","signature_b64":"mdcoTJYZscCN4rfmUWtrq3/o6BojPx3MQ1iJjyAddQ7gNV5qXb0dG+GRlUX5NelZhEAYCaJUAus8roCSh20XAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0cd7eaa4b5b327f6569b6c3faf9352a93c78b26bdd1f6bc86dac185a6f62e7b2","last_reissued_at":"2026-05-18T02:00:54.333702Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:54.333702Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.2775","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":"2026-05-18T02:00:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SDkMZUJjOJhd+ZyP65jIfZ2lbqgBp/EserB8JneH8a4IvFONw4ZB3ky4jvda7FylkTgunZv9qOK+fhiVo5USDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T17:15:10.670666Z"},"content_sha256":"522e2569b6afd24fc8f2a650570ebfbf34f65ec9f263c4a2597baefa31e5c181","schema_version":"1.0","event_id":"sha256:522e2569b6afd24fc8f2a650570ebfbf34f65ec9f263c4a2597baefa31e5c181"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:BTL6VJFVWMT7MVU3NQ727E2SVE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"All-optical link for direct comparison of distant optical clocks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"physics.optics","authors_text":"Atsushi Yamaguchi, Hidekazu Hachisu, Miho Fujieda, Motohiro Kumagai, Shigeo Nagano, Tetsuya Ido","submitted_at":"2011-08-13T08:30:12Z","abstract_excerpt":"We developed an all-optical link system for making remote comparisons of two distant ultra-stable optical clocks. An optical carrier transfer system based on a fiber interferometer was employed to compensate the phase noise accumulated during the propagation through a fiber link. Transfer stabilities of $2\\times10^{-15}$ at 1 second and $4\\times10^{-18}$ at 1000 seconds were achieved in a 90-km link. An active polarization control system was additionally introduced to maintain the transmitted light in an adequate polarization, and consequently, a stable and reliable comparison was accomplished"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.2775","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":""},"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":"2026-05-18T02:00:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dt5ZdZjvls9PmiQh1twDBy1kU0s/WpwjNoT1JGOG3UbVE+qIF8oUc21F4rEL0otmQZx8bZ3lkaDF/96HPLG5Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T17:15:10.671006Z"},"content_sha256":"7f8e430d8e0594302043140d52d2f9677d518375d6694ba182ffb939daa2a5fd","schema_version":"1.0","event_id":"sha256:7f8e430d8e0594302043140d52d2f9677d518375d6694ba182ffb939daa2a5fd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/bundle.json","state_url":"https://pith.science/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/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":"2026-06-06T17:15:10Z","links":{"resolver":"https://pith.science/pith/BTL6VJFVWMT7MVU3NQ727E2SVE","bundle":"https://pith.science/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/bundle.json","state":"https://pith.science/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BTL6VJFVWMT7MVU3NQ727E2SVE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:BTL6VJFVWMT7MVU3NQ727E2SVE","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":"03fc8caded6b5ba79334303e31dc47d54ae821e8b11fc7aeebce5c08fa7087ba","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-13T08:30:12Z","title_canon_sha256":"75391cece0c813a7a6934c2482df99fcfefbf3ed9173c18b08132e08a91bbc51"},"schema_version":"1.0","source":{"id":"1108.2775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.2775","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"arxiv_version","alias_value":"1108.2775v1","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.2775","created_at":"2026-05-18T02:00:54Z"},{"alias_kind":"pith_short_12","alias_value":"BTL6VJFVWMT7","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BTL6VJFVWMT7MVU3","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BTL6VJFV","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:7f8e430d8e0594302043140d52d2f9677d518375d6694ba182ffb939daa2a5fd","target":"graph","created_at":"2026-05-18T02:00:54Z","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":"We developed an all-optical link system for making remote comparisons of two distant ultra-stable optical clocks. An optical carrier transfer system based on a fiber interferometer was employed to compensate the phase noise accumulated during the propagation through a fiber link. Transfer stabilities of $2\\times10^{-15}$ at 1 second and $4\\times10^{-18}$ at 1000 seconds were achieved in a 90-km link. An active polarization control system was additionally introduced to maintain the transmitted light in an adequate polarization, and consequently, a stable and reliable comparison was accomplished","authors_text":"Atsushi Yamaguchi, Hidekazu Hachisu, Miho Fujieda, Motohiro Kumagai, Shigeo Nagano, Tetsuya Ido","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-13T08:30:12Z","title":"All-optical link for direct comparison of distant optical clocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.2775","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":"sha256:522e2569b6afd24fc8f2a650570ebfbf34f65ec9f263c4a2597baefa31e5c181","target":"record","created_at":"2026-05-18T02:00:54Z","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":"03fc8caded6b5ba79334303e31dc47d54ae821e8b11fc7aeebce5c08fa7087ba","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-08-13T08:30:12Z","title_canon_sha256":"75391cece0c813a7a6934c2482df99fcfefbf3ed9173c18b08132e08a91bbc51"},"schema_version":"1.0","source":{"id":"1108.2775","kind":"arxiv","version":1}},"canonical_sha256":"0cd7eaa4b5b327f6569b6c3faf9352a93c78b26bdd1f6bc86dac185a6f62e7b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0cd7eaa4b5b327f6569b6c3faf9352a93c78b26bdd1f6bc86dac185a6f62e7b2","first_computed_at":"2026-05-18T02:00:54.333702Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:54.333702Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mdcoTJYZscCN4rfmUWtrq3/o6BojPx3MQ1iJjyAddQ7gNV5qXb0dG+GRlUX5NelZhEAYCaJUAus8roCSh20XAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:54.334454Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.2775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:522e2569b6afd24fc8f2a650570ebfbf34f65ec9f263c4a2597baefa31e5c181","sha256:7f8e430d8e0594302043140d52d2f9677d518375d6694ba182ffb939daa2a5fd"],"state_sha256":"82fffed27fdaea0a9b0e14e45d6387fecf278c73b58b7c8b9ff231c78fbeef4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xi4YQhMWlzMkSibgikrNMm6whecJenGwATWyvpuj29dckbLNJcneJkDErLbNpbQHgioTqUzwjqi0tEKsvBH1DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T17:15:10.673016Z","bundle_sha256":"db9133da07c5171ac51908d28e766060e04cc36bfec4875b5dd984f99c64f4f9"}}