{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:OWAY3JVAEVJNR4OEH2CRSS23GN","short_pith_number":"pith:OWAY3JVA","canonical_record":{"source":{"id":"1005.4650","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-25T18:21:07Z","cross_cats_sorted":[],"title_canon_sha256":"0c29580f1c46fe1d82600bdbb94e77cd3d6d7e272c96c8c11cbd22b5c591aa72","abstract_canon_sha256":"4cf5c6f42f703a5052a8ab563f3f7a76ec5190d1bd895707c4ffa28ed0bd78c9"},"schema_version":"1.0"},"canonical_sha256":"75818da6a02552d8f1c43e85194b5b337cf92572822269a3b6e7dbd34faeab11","source":{"kind":"arxiv","id":"1005.4650","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4650","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4650v1","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4650","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"pith_short_12","alias_value":"OWAY3JVAEVJN","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OWAY3JVAEVJNR4OE","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OWAY3JVA","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:OWAY3JVAEVJNR4OEH2CRSS23GN","target":"record","payload":{"canonical_record":{"source":{"id":"1005.4650","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-25T18:21:07Z","cross_cats_sorted":[],"title_canon_sha256":"0c29580f1c46fe1d82600bdbb94e77cd3d6d7e272c96c8c11cbd22b5c591aa72","abstract_canon_sha256":"4cf5c6f42f703a5052a8ab563f3f7a76ec5190d1bd895707c4ffa28ed0bd78c9"},"schema_version":"1.0"},"canonical_sha256":"75818da6a02552d8f1c43e85194b5b337cf92572822269a3b6e7dbd34faeab11","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:23.968009Z","signature_b64":"LGnyzuMg/aDe2DK+nu7/Laqjg7UZMzY1pft8tLT5LRC74AmJcEwskzRS/6p0Jn5ACuOUsAT1nVzEYPeXCzruDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75818da6a02552d8f1c43e85194b5b337cf92572822269a3b6e7dbd34faeab11","last_reissued_at":"2026-05-18T01:09:23.967590Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:23.967590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.4650","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":"2026-05-18T01:09:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9oKP6fza08yPNkFCJmA1U1RcLCPunJMtrlhtv8SzopU1U/etI7MkHJX0viYe9mU9WRFy153akceze0CayhMMDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:58:37.692409Z"},"content_sha256":"a99093f1de0f80bcbc562f373905b260a9d75101a91ccfb79c94146c25864194","schema_version":"1.0","event_id":"sha256:a99093f1de0f80bcbc562f373905b260a9d75101a91ccfb79c94146c25864194"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:OWAY3JVAEVJNR4OEH2CRSS23GN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andr\\'e Th\\\"uring, Christian Gr\\\"af, Henning Vahlbruch, Karsten Danzmann, Moritz Mehmet, Roman Schnabel","submitted_at":"2010-05-25T18:21:07Z","abstract_excerpt":"Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4650","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":"2026-05-18T01:09:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zMvmf+QeU3rfc509sNejr1pi68VALHrbwk5sSZX6pFfR2C3sh3Nt16wIumjxNgUsPojk7DCxUr1Jr81SlCOPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:58:37.693073Z"},"content_sha256":"d272598cb777efbc9f27021ca7c4c4811c5ec64c87b809bba96907a142dc1ff3","schema_version":"1.0","event_id":"sha256:d272598cb777efbc9f27021ca7c4c4811c5ec64c87b809bba96907a142dc1ff3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/bundle.json","state_url":"https://pith.science/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/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":"2026-06-06T19:58:37Z","links":{"resolver":"https://pith.science/pith/OWAY3JVAEVJNR4OEH2CRSS23GN","bundle":"https://pith.science/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/bundle.json","state":"https://pith.science/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OWAY3JVAEVJNR4OEH2CRSS23GN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:OWAY3JVAEVJNR4OEH2CRSS23GN","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":"4cf5c6f42f703a5052a8ab563f3f7a76ec5190d1bd895707c4ffa28ed0bd78c9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-25T18:21:07Z","title_canon_sha256":"0c29580f1c46fe1d82600bdbb94e77cd3d6d7e272c96c8c11cbd22b5c591aa72"},"schema_version":"1.0","source":{"id":"1005.4650","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4650","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4650v1","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4650","created_at":"2026-05-18T01:09:23Z"},{"alias_kind":"pith_short_12","alias_value":"OWAY3JVAEVJN","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OWAY3JVAEVJNR4OE","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OWAY3JVA","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:d272598cb777efbc9f27021ca7c4c4811c5ec64c87b809bba96907a142dc1ff3","target":"graph","created_at":"2026-05-18T01:09:23Z","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":"Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of ","authors_text":"Andr\\'e Th\\\"uring, Christian Gr\\\"af, Henning Vahlbruch, Karsten Danzmann, Moritz Mehmet, Roman Schnabel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-25T18:21:07Z","title":"Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4650","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:a99093f1de0f80bcbc562f373905b260a9d75101a91ccfb79c94146c25864194","target":"record","created_at":"2026-05-18T01:09:23Z","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":"4cf5c6f42f703a5052a8ab563f3f7a76ec5190d1bd895707c4ffa28ed0bd78c9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-25T18:21:07Z","title_canon_sha256":"0c29580f1c46fe1d82600bdbb94e77cd3d6d7e272c96c8c11cbd22b5c591aa72"},"schema_version":"1.0","source":{"id":"1005.4650","kind":"arxiv","version":1}},"canonical_sha256":"75818da6a02552d8f1c43e85194b5b337cf92572822269a3b6e7dbd34faeab11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75818da6a02552d8f1c43e85194b5b337cf92572822269a3b6e7dbd34faeab11","first_computed_at":"2026-05-18T01:09:23.967590Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:23.967590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LGnyzuMg/aDe2DK+nu7/Laqjg7UZMzY1pft8tLT5LRC74AmJcEwskzRS/6p0Jn5ACuOUsAT1nVzEYPeXCzruDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:23.968009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.4650","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a99093f1de0f80bcbc562f373905b260a9d75101a91ccfb79c94146c25864194","sha256:d272598cb777efbc9f27021ca7c4c4811c5ec64c87b809bba96907a142dc1ff3"],"state_sha256":"754f20a13ea5fc162df69291e19048849d80567f91d473be3a27a1c3a6b2d850"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Q3NH48XmMGUCIPQWDaqjrCbAcEBr2FkhZqWPIflaSfrEXdI2R/CELSwwfQhGhkRn+apH51UtXMd4ViMulxdBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:58:37.696733Z","bundle_sha256":"fc9d6f4ae8e6d848bd4ce331e324b0b087972add1538175c151ec20a28dfcf22"}}