{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:HTQB76RWLKVLQRBGIKNWURP4HV","short_pith_number":"pith:HTQB76RW","canonical_record":{"source":{"id":"1501.00346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-01-02T05:32:02Z","cross_cats_sorted":[],"title_canon_sha256":"55a880309bddc658b62c94d50d6ba392fb7462adb9eac34eb3bef9c356ef7d93","abstract_canon_sha256":"98b6d73d7805427380ac21d8d4d6f92c8771d3195b60bdb4515d176c72c3539e"},"schema_version":"1.0"},"canonical_sha256":"3ce01ffa365aaab84426429b6a45fc3d6d594893741552c519b34bc766613de9","source":{"kind":"arxiv","id":"1501.00346","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00346","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00346v1","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00346","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"pith_short_12","alias_value":"HTQB76RWLKVL","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTQB76RWLKVLQRBG","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTQB76RW","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:HTQB76RWLKVLQRBGIKNWURP4HV","target":"record","payload":{"canonical_record":{"source":{"id":"1501.00346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-01-02T05:32:02Z","cross_cats_sorted":[],"title_canon_sha256":"55a880309bddc658b62c94d50d6ba392fb7462adb9eac34eb3bef9c356ef7d93","abstract_canon_sha256":"98b6d73d7805427380ac21d8d4d6f92c8771d3195b60bdb4515d176c72c3539e"},"schema_version":"1.0"},"canonical_sha256":"3ce01ffa365aaab84426429b6a45fc3d6d594893741552c519b34bc766613de9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:09.462535Z","signature_b64":"agSxk2V6lJXfnHjSHTBZVRq99oxrXG8GXQhRjn0dIucn9+hIKTV3DnrDg4F8fq/QUT6PUX+f8d2bsMvTvcXQBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ce01ffa365aaab84426429b6a45fc3d6d594893741552c519b34bc766613de9","last_reissued_at":"2026-05-18T02:30:09.462056Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:09.462056Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.00346","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":"2026-05-18T02:30:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dmd8xywKD06k8Rc5uznrNw+QWsvkmkwlj/ivnO4Rd9gDiGMRkjQSv4DEk0TT5uG5bClnzCp2U+bSB+BDs7/nDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:15:28.246946Z"},"content_sha256":"f77681ac6110d9286b32ac4ef4f2a6de111f78d19c7a8b78c7b85100ddba0921","schema_version":"1.0","event_id":"sha256:f77681ac6110d9286b32ac4ef4f2a6de111f78d19c7a8b78c7b85100ddba0921"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:HTQB76RWLKVLQRBGIKNWURP4HV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum-Limited Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Andre N. Luiten, Eric F. May, Gar-Wing Truong, James D. Anstie, Thomas M. Stace","submitted_at":"2015-01-02T05:32:02Z","abstract_excerpt":"Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a ten-fold improvement in the accurac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00346","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":"2026-05-18T02:30:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/loOr2w61HjeHvG6yz58iM6X+s6Gvy3jYO9V3G+XQxO0LXXUPlK+zO0e3Kf/XZ93h3mG5oIvIxb8Kmlk/kHSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:15:28.247684Z"},"content_sha256":"61163d19514561b1a041268b0620faba8ef6ae34f4f6a66e9ed6cb0b37b96333","schema_version":"1.0","event_id":"sha256:61163d19514561b1a041268b0620faba8ef6ae34f4f6a66e9ed6cb0b37b96333"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HTQB76RWLKVLQRBGIKNWURP4HV/bundle.json","state_url":"https://pith.science/pith/HTQB76RWLKVLQRBGIKNWURP4HV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HTQB76RWLKVLQRBGIKNWURP4HV/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":"2026-06-08T05:15:28Z","links":{"resolver":"https://pith.science/pith/HTQB76RWLKVLQRBGIKNWURP4HV","bundle":"https://pith.science/pith/HTQB76RWLKVLQRBGIKNWURP4HV/bundle.json","state":"https://pith.science/pith/HTQB76RWLKVLQRBGIKNWURP4HV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HTQB76RWLKVLQRBGIKNWURP4HV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HTQB76RWLKVLQRBGIKNWURP4HV","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":"98b6d73d7805427380ac21d8d4d6f92c8771d3195b60bdb4515d176c72c3539e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-01-02T05:32:02Z","title_canon_sha256":"55a880309bddc658b62c94d50d6ba392fb7462adb9eac34eb3bef9c356ef7d93"},"schema_version":"1.0","source":{"id":"1501.00346","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00346","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00346v1","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00346","created_at":"2026-05-18T02:30:09Z"},{"alias_kind":"pith_short_12","alias_value":"HTQB76RWLKVL","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTQB76RWLKVLQRBG","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTQB76RW","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:61163d19514561b1a041268b0620faba8ef6ae34f4f6a66e9ed6cb0b37b96333","target":"graph","created_at":"2026-05-18T02:30:09Z","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":"Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a ten-fold improvement in the accurac","authors_text":"Andre N. Luiten, Eric F. May, Gar-Wing Truong, James D. Anstie, Thomas M. Stace","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-01-02T05:32:02Z","title":"Quantum-Limited Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00346","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:f77681ac6110d9286b32ac4ef4f2a6de111f78d19c7a8b78c7b85100ddba0921","target":"record","created_at":"2026-05-18T02:30:09Z","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":"98b6d73d7805427380ac21d8d4d6f92c8771d3195b60bdb4515d176c72c3539e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2015-01-02T05:32:02Z","title_canon_sha256":"55a880309bddc658b62c94d50d6ba392fb7462adb9eac34eb3bef9c356ef7d93"},"schema_version":"1.0","source":{"id":"1501.00346","kind":"arxiv","version":1}},"canonical_sha256":"3ce01ffa365aaab84426429b6a45fc3d6d594893741552c519b34bc766613de9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ce01ffa365aaab84426429b6a45fc3d6d594893741552c519b34bc766613de9","first_computed_at":"2026-05-18T02:30:09.462056Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:09.462056Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"agSxk2V6lJXfnHjSHTBZVRq99oxrXG8GXQhRjn0dIucn9+hIKTV3DnrDg4F8fq/QUT6PUX+f8d2bsMvTvcXQBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:09.462535Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.00346","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f77681ac6110d9286b32ac4ef4f2a6de111f78d19c7a8b78c7b85100ddba0921","sha256:61163d19514561b1a041268b0620faba8ef6ae34f4f6a66e9ed6cb0b37b96333"],"state_sha256":"20211db829fe74bf2ec3f09a2f676f2abbeec52182724d077ace4cd255196799"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cpBd6H/8M+qu/rbZVKGFul1oss24wBXW4tGRIZiDh1AyoU9gmjJl+bcr2bfzqCNGxGJmfR5r+738NKtvo9obBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T05:15:28.251189Z","bundle_sha256":"d29d72a0971c8bd13f3698234d2e16ca2af0646d83b478913b1039bfbc7dd439"}}