{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RVEFY3UUSSEQQ57PRAV2HGBYJ4","short_pith_number":"pith:RVEFY3UU","canonical_record":{"source":{"id":"1905.04980","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-13T11:33:39Z","cross_cats_sorted":[],"title_canon_sha256":"ac466c585aebef158db165cf67369a2871f87551404390afed0a3ae258b914db","abstract_canon_sha256":"b53239b0584248016a92a3c9e931ac063a285322b3379529ee37202e519e0bf1"},"schema_version":"1.0"},"canonical_sha256":"8d485c6e9494890877ef882ba398384f389e0a8843f4a8a701b7d89c7cdb883d","source":{"kind":"arxiv","id":"1905.04980","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.04980","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1905.04980v1","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.04980","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"RVEFY3UUSSEQ","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RVEFY3UUSSEQQ57P","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RVEFY3UU","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RVEFY3UUSSEQQ57PRAV2HGBYJ4","target":"record","payload":{"canonical_record":{"source":{"id":"1905.04980","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-13T11:33:39Z","cross_cats_sorted":[],"title_canon_sha256":"ac466c585aebef158db165cf67369a2871f87551404390afed0a3ae258b914db","abstract_canon_sha256":"b53239b0584248016a92a3c9e931ac063a285322b3379529ee37202e519e0bf1"},"schema_version":"1.0"},"canonical_sha256":"8d485c6e9494890877ef882ba398384f389e0a8843f4a8a701b7d89c7cdb883d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:22.936073Z","signature_b64":"3RHqodLCDmoiMpN8Upi4v7Kg0PGX3/LXrtJzQkcAQgN5QwFZ+dqYGC7NRMbX5a3iLm/hlsdvY5J6EQmjvihZAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d485c6e9494890877ef882ba398384f389e0a8843f4a8a701b7d89c7cdb883d","last_reissued_at":"2026-05-17T23:46:22.935410Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:22.935410Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.04980","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":"2026-05-17T23:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YnJHUow/Ynnq+VznuQ2TV/LdEtv12fjpX9cuvNDpu4pVgdsgcop53vaqRDn+9xPnEq6Pj/CC1SJB1X9uythDCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T07:49:51.395090Z"},"content_sha256":"f1a3ff99c95f1f5da090afeddc08b9688a1629f4603c34cd34b247d597a4f565","schema_version":"1.0","event_id":"sha256:f1a3ff99c95f1f5da090afeddc08b9688a1629f4603c34cd34b247d597a4f565"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RVEFY3UUSSEQQ57PRAV2HGBYJ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comment on \"Retrieval of phase relation and emission profile of quantum cascade laser frequency combs''","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"G\\\"unter Steinmeyer","submitted_at":"2019-05-13T11:33:39Z","abstract_excerpt":"A recent publication on arXiv:1905.00668 suggests that the phase relationship within a frequency comb can be reconstructed from a heterodyne measurement using a reference comb. In principle, following this approach, such retrieval of optical phases appears possible, but should give rise to a temporally constant signal. Instead, arXiv:1905.00668 provides experimental evidence for a pronounced relative drift of the phases, which indicates that the modes of the comb are not coherently phase-locked. This temporal drift can be explained if the comb under test is not equidistant. This further means "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.04980","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":"2026-05-17T23:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CStw9YQQw1OGAZekdsaZFHcKCKYkGz8fSzBRQAtiGB9pkcNm4fFOUrxoEAlR8snN1dyoV6zNtDjR11WX7mywBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T07:49:51.395758Z"},"content_sha256":"13dbc363cc9729ef4db45c8e9e401bcc603680af9fda17d5eef80b5db3eef505","schema_version":"1.0","event_id":"sha256:13dbc363cc9729ef4db45c8e9e401bcc603680af9fda17d5eef80b5db3eef505"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/bundle.json","state_url":"https://pith.science/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/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":"2026-06-09T07:49:51Z","links":{"resolver":"https://pith.science/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4","bundle":"https://pith.science/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/bundle.json","state":"https://pith.science/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RVEFY3UUSSEQQ57PRAV2HGBYJ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RVEFY3UUSSEQQ57PRAV2HGBYJ4","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":"b53239b0584248016a92a3c9e931ac063a285322b3379529ee37202e519e0bf1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-13T11:33:39Z","title_canon_sha256":"ac466c585aebef158db165cf67369a2871f87551404390afed0a3ae258b914db"},"schema_version":"1.0","source":{"id":"1905.04980","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.04980","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1905.04980v1","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.04980","created_at":"2026-05-17T23:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"RVEFY3UUSSEQ","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RVEFY3UUSSEQQ57P","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RVEFY3UU","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:13dbc363cc9729ef4db45c8e9e401bcc603680af9fda17d5eef80b5db3eef505","target":"graph","created_at":"2026-05-17T23:46:22Z","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":"A recent publication on arXiv:1905.00668 suggests that the phase relationship within a frequency comb can be reconstructed from a heterodyne measurement using a reference comb. In principle, following this approach, such retrieval of optical phases appears possible, but should give rise to a temporally constant signal. Instead, arXiv:1905.00668 provides experimental evidence for a pronounced relative drift of the phases, which indicates that the modes of the comb are not coherently phase-locked. This temporal drift can be explained if the comb under test is not equidistant. This further means ","authors_text":"G\\\"unter Steinmeyer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-13T11:33:39Z","title":"Comment on \"Retrieval of phase relation and emission profile of quantum cascade laser frequency combs''"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.04980","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:f1a3ff99c95f1f5da090afeddc08b9688a1629f4603c34cd34b247d597a4f565","target":"record","created_at":"2026-05-17T23:46:22Z","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":"b53239b0584248016a92a3c9e931ac063a285322b3379529ee37202e519e0bf1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-13T11:33:39Z","title_canon_sha256":"ac466c585aebef158db165cf67369a2871f87551404390afed0a3ae258b914db"},"schema_version":"1.0","source":{"id":"1905.04980","kind":"arxiv","version":1}},"canonical_sha256":"8d485c6e9494890877ef882ba398384f389e0a8843f4a8a701b7d89c7cdb883d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d485c6e9494890877ef882ba398384f389e0a8843f4a8a701b7d89c7cdb883d","first_computed_at":"2026-05-17T23:46:22.935410Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:22.935410Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3RHqodLCDmoiMpN8Upi4v7Kg0PGX3/LXrtJzQkcAQgN5QwFZ+dqYGC7NRMbX5a3iLm/hlsdvY5J6EQmjvihZAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:22.936073Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.04980","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1a3ff99c95f1f5da090afeddc08b9688a1629f4603c34cd34b247d597a4f565","sha256:13dbc363cc9729ef4db45c8e9e401bcc603680af9fda17d5eef80b5db3eef505"],"state_sha256":"f1b50a5dc3d1dc67d8e6e50e2b2caea300945995dac872ceb4cf47c99eff7ae3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QMMJKw8ulf5Bo7ODky7CQjJcGP51LPWCPFCon5crZUt71x33Ys2E7RlwGMInRK440PvQRDirMdtSLqEhmJz6DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T07:49:51.400261Z","bundle_sha256":"09bc7cdab85af59baac907e6f01da76eb86c1b59ac7c8bbdbc40a7d83ed498b4"}}