{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:T3FPXD26YJIAZLCF6HNZO3USAA","short_pith_number":"pith:T3FPXD26","canonical_record":{"source":{"id":"2102.00301","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-01-30T19:58:55Z","cross_cats_sorted":[],"title_canon_sha256":"b5332d7db353585939da451e2557812057da00079a2f88a3bdae5de656514db9","abstract_canon_sha256":"eebbd9a5228b9f8d9592ebf629f3e1993807fe78138f1c27867a9483b9d66412"},"schema_version":"1.0"},"canonical_sha256":"9ecafb8f5ec2500cac45f1db976e9200237639641e1400aba5bea86bc1744d07","source":{"kind":"arxiv","id":"2102.00301","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.00301","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"arxiv_version","alias_value":"2102.00301v2","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.00301","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_12","alias_value":"T3FPXD26YJIA","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_16","alias_value":"T3FPXD26YJIAZLCF","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_8","alias_value":"T3FPXD26","created_at":"2026-07-05T03:41:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:T3FPXD26YJIAZLCF6HNZO3USAA","target":"record","payload":{"canonical_record":{"source":{"id":"2102.00301","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-01-30T19:58:55Z","cross_cats_sorted":[],"title_canon_sha256":"b5332d7db353585939da451e2557812057da00079a2f88a3bdae5de656514db9","abstract_canon_sha256":"eebbd9a5228b9f8d9592ebf629f3e1993807fe78138f1c27867a9483b9d66412"},"schema_version":"1.0"},"canonical_sha256":"9ecafb8f5ec2500cac45f1db976e9200237639641e1400aba5bea86bc1744d07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:41:02.197308Z","signature_b64":"80ejjybtVH+fTMXgWYhs3GykritbJpgHB2OXbqPbF3G9G1Q3YUuB8onQTZQbkXl6JIDQZMl3WGZljBXBSPi0CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ecafb8f5ec2500cac45f1db976e9200237639641e1400aba5bea86bc1744d07","last_reissued_at":"2026-07-05T03:41:02.196907Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:41:02.196907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.00301","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:41:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"araTnYSzfjCIXUY/zbeluZaNp080rhATKU5oqTkVw5F0YyN9fjfNOMhGeBkN80hET756fxZFmbNZRTWfjRtdCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:47:27.169211Z"},"content_sha256":"327017ea6fc8827c8666eeb25a9334e9821fd54fc78bfde7103cf24f243dcd4e","schema_version":"1.0","event_id":"sha256:327017ea6fc8827c8666eeb25a9334e9821fd54fc78bfde7103cf24f243dcd4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:T3FPXD26YJIAZLCF6HNZO3USAA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-Broadband Kerr Microcomb Through Soliton Spectral Translation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Ashutosh Rao, Edgar F. Perez, Gregory Moille, Jordan R. Stone, Kartik Srinivasan, Tahmid Sami Rahman, Xiyuan Lu, Yanne Chembo","submitted_at":"2021-01-30T19:58:55Z","abstract_excerpt":"Broad bandwidth and stable microresonator frequency combs are critical for accurate and precise optical frequency measurements in a compact and deployable format. Typically, broad bandwidths (e.g., octave spans) are achieved by tailoring the microresonator's geometric dispersion. However, geometric dispersion engineering alone may be insufficient for sustaining bandwidths well beyond an octave. Here, we introduce the novel concept of synthetic dispersion, in which a second pump laser effectively alters the dispersion landscape to create Kerr soliton microcombs that extend far beyond the anomal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.00301","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.00301/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:41:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dvnvJ04wN0WF7o5ivjZYSFlYfaNeL5WlfkaQ2CxAWlFo+1okT/whJ+RrZA+MwnJa6tmKEDl8l3gdW2kfIYCxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:47:27.169603Z"},"content_sha256":"662c19d3395f394cc0331a9415a601b722f72fa96e149df4eb40c11fcfc89af6","schema_version":"1.0","event_id":"sha256:662c19d3395f394cc0331a9415a601b722f72fa96e149df4eb40c11fcfc89af6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T3FPXD26YJIAZLCF6HNZO3USAA/bundle.json","state_url":"https://pith.science/pith/T3FPXD26YJIAZLCF6HNZO3USAA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T3FPXD26YJIAZLCF6HNZO3USAA/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":"2026-07-07T13:47:27Z","links":{"resolver":"https://pith.science/pith/T3FPXD26YJIAZLCF6HNZO3USAA","bundle":"https://pith.science/pith/T3FPXD26YJIAZLCF6HNZO3USAA/bundle.json","state":"https://pith.science/pith/T3FPXD26YJIAZLCF6HNZO3USAA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T3FPXD26YJIAZLCF6HNZO3USAA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:T3FPXD26YJIAZLCF6HNZO3USAA","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":"eebbd9a5228b9f8d9592ebf629f3e1993807fe78138f1c27867a9483b9d66412","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-01-30T19:58:55Z","title_canon_sha256":"b5332d7db353585939da451e2557812057da00079a2f88a3bdae5de656514db9"},"schema_version":"1.0","source":{"id":"2102.00301","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.00301","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"arxiv_version","alias_value":"2102.00301v2","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.00301","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_12","alias_value":"T3FPXD26YJIA","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_16","alias_value":"T3FPXD26YJIAZLCF","created_at":"2026-07-05T03:41:02Z"},{"alias_kind":"pith_short_8","alias_value":"T3FPXD26","created_at":"2026-07-05T03:41:02Z"}],"graph_snapshots":[{"event_id":"sha256:662c19d3395f394cc0331a9415a601b722f72fa96e149df4eb40c11fcfc89af6","target":"graph","created_at":"2026-07-05T03:41:02Z","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/2102.00301/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Broad bandwidth and stable microresonator frequency combs are critical for accurate and precise optical frequency measurements in a compact and deployable format. Typically, broad bandwidths (e.g., octave spans) are achieved by tailoring the microresonator's geometric dispersion. However, geometric dispersion engineering alone may be insufficient for sustaining bandwidths well beyond an octave. Here, we introduce the novel concept of synthetic dispersion, in which a second pump laser effectively alters the dispersion landscape to create Kerr soliton microcombs that extend far beyond the anomal","authors_text":"Ashutosh Rao, Edgar F. Perez, Gregory Moille, Jordan R. Stone, Kartik Srinivasan, Tahmid Sami Rahman, Xiyuan Lu, Yanne Chembo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-01-30T19:58:55Z","title":"Ultra-Broadband Kerr Microcomb Through Soliton Spectral Translation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.00301","kind":"arxiv","version":2},"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":"sha256:327017ea6fc8827c8666eeb25a9334e9821fd54fc78bfde7103cf24f243dcd4e","target":"record","created_at":"2026-07-05T03:41:02Z","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":"eebbd9a5228b9f8d9592ebf629f3e1993807fe78138f1c27867a9483b9d66412","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-01-30T19:58:55Z","title_canon_sha256":"b5332d7db353585939da451e2557812057da00079a2f88a3bdae5de656514db9"},"schema_version":"1.0","source":{"id":"2102.00301","kind":"arxiv","version":2}},"canonical_sha256":"9ecafb8f5ec2500cac45f1db976e9200237639641e1400aba5bea86bc1744d07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ecafb8f5ec2500cac45f1db976e9200237639641e1400aba5bea86bc1744d07","first_computed_at":"2026-07-05T03:41:02.196907Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:41:02.196907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"80ejjybtVH+fTMXgWYhs3GykritbJpgHB2OXbqPbF3G9G1Q3YUuB8onQTZQbkXl6JIDQZMl3WGZljBXBSPi0CA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:41:02.197308Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.00301","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:327017ea6fc8827c8666eeb25a9334e9821fd54fc78bfde7103cf24f243dcd4e","sha256:662c19d3395f394cc0331a9415a601b722f72fa96e149df4eb40c11fcfc89af6"],"state_sha256":"1d65d3527f6e0317d1ee45bf63f6425ee56fb87940ebc36c4acb124df2621371"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tkjOAFyQrl1f+vEX1rY8C8dW82tAUzwEpQPzCtTF0T88eie+/xCRKW47/f0u3aDo/VhO8baABizh8QhbwuZyDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:47:27.171658Z","bundle_sha256":"e76a55564ce8778439551251c82af03c86e6d373874e14f8286aa05d08eff431"}}