{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:32R7WOTIYOZH7RUVPWTQPFX7YA","short_pith_number":"pith:32R7WOTI","canonical_record":{"source":{"id":"gr-qc/0008026","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2000-08-11T06:07:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"506b600aa309115ad9a63276f2e5e3ba18c1bb74f78e351c8cffe66cca8f5e02","abstract_canon_sha256":"61063e9319564f39ee8cdceef1c70202dbba363e4e865e2224f62163474c9653"},"schema_version":"1.0"},"canonical_sha256":"dea3fb3a68c3b27fc6957da70796ffc01f2c4d13ead04b7b801a9b693d9a1e24","source":{"kind":"arxiv","id":"gr-qc/0008026","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0008026","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0008026v2","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0008026","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"32R7WOTIYOZH","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_16","alias_value":"32R7WOTIYOZH7RUV","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_8","alias_value":"32R7WOTI","created_at":"2026-07-04T16:19:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:32R7WOTIYOZH7RUVPWTQPFX7YA","target":"record","payload":{"canonical_record":{"source":{"id":"gr-qc/0008026","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2000-08-11T06:07:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"506b600aa309115ad9a63276f2e5e3ba18c1bb74f78e351c8cffe66cca8f5e02","abstract_canon_sha256":"61063e9319564f39ee8cdceef1c70202dbba363e4e865e2224f62163474c9653"},"schema_version":"1.0"},"canonical_sha256":"dea3fb3a68c3b27fc6957da70796ffc01f2c4d13ead04b7b801a9b693d9a1e24","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:19:40.987264Z","signature_b64":"JjLOzGIwM6GfHKfuqfYkzGZ5d6zZkBrS9Khaqq6Par0PYc1+LvRkSGkkG2gZqATf4B2POrg1wBmu8367OFdxDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dea3fb3a68c3b27fc6957da70796ffc01f2c4d13ead04b7b801a9b693d9a1e24","last_reissued_at":"2026-07-04T16:19:40.986838Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:19:40.986838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"gr-qc/0008026","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":"2026-07-04T16:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hJMrsd1MHdaMhrazYYw1aGtH85wnXowifpE1ZWH31LsyAYfIFpmILbaMm24Zr7a6u2ACdMFY3qqILiUy/RdXDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:39:08.015466Z"},"content_sha256":"b0f25cd29ed6a1d7164bf33458a34c9f5a245ba2f47bbadf0a1b99ab0604da2d","schema_version":"1.0","event_id":"sha256:b0f25cd29ed6a1d7164bf33458a34c9f5a245ba2f47bbadf0a1b99ab0604da2d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:32R7WOTIYOZH7RUVPWTQPFX7YA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Conversion of conventional gravitational-wave interferometers into QND interferometers by modifying their input and/or output optics","license":"","headline":"","cross_cats":["quant-ph"],"primary_cat":"gr-qc","authors_text":"2), (2) University of California, (3) Texas A&M University, (4) Moscow State University), Andrey B. Matsko (3), Berkeley, H.J. Kimble (1), Kip S. Thorne (1), Sergey P. Vyatchanin (4) ((1) California Institute of Technology, Yuri Levin (1","submitted_at":"2000-08-11T06:07:43Z","abstract_excerpt":"The LIGO-II gravitational-wave interferometers (ca. 2006--2008) are designed to have sensitivities at about the standard quantum limit (SQL) near 100 Hz. This paper describes and analyzes possible designs for subsequent, LIGO-III interferometers that can beat the SQL. These designs are identical to a conventional broad-band interferometer (without signal recycling), except for new input and/or output optics. Three designs are analyzed: (i) a \"squeezed-input interferometer\" (conceived by Unruh based on earlier work of Caves) in which squeezed vacuum with frequency-dependent (FD) squeeze angle i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0008026","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/gr-qc/0008026/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":"2026-07-04T16:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CTiSOadcboF9nrzEd1RMYlFGfE4k4xxFSaX6/vEC7B12As1QN567AXS9TPSMe2QLWpqCkQnopOopOI96ZYwwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T21:39:08.016382Z"},"content_sha256":"dbabaeca4a1df065b16a84361e3b6876a8e1e111e57f82dbca771bebe333cc7b","schema_version":"1.0","event_id":"sha256:dbabaeca4a1df065b16a84361e3b6876a8e1e111e57f82dbca771bebe333cc7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/bundle.json","state_url":"https://pith.science/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/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":"2026-08-01T21:39:08Z","links":{"resolver":"https://pith.science/pith/32R7WOTIYOZH7RUVPWTQPFX7YA","bundle":"https://pith.science/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/bundle.json","state":"https://pith.science/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/32R7WOTIYOZH7RUVPWTQPFX7YA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:32R7WOTIYOZH7RUVPWTQPFX7YA","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":"61063e9319564f39ee8cdceef1c70202dbba363e4e865e2224f62163474c9653","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2000-08-11T06:07:43Z","title_canon_sha256":"506b600aa309115ad9a63276f2e5e3ba18c1bb74f78e351c8cffe66cca8f5e02"},"schema_version":"1.0","source":{"id":"gr-qc/0008026","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0008026","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0008026v2","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0008026","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"32R7WOTIYOZH","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_16","alias_value":"32R7WOTIYOZH7RUV","created_at":"2026-07-04T16:19:40Z"},{"alias_kind":"pith_short_8","alias_value":"32R7WOTI","created_at":"2026-07-04T16:19:40Z"}],"graph_snapshots":[{"event_id":"sha256:dbabaeca4a1df065b16a84361e3b6876a8e1e111e57f82dbca771bebe333cc7b","target":"graph","created_at":"2026-07-04T16:19:40Z","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/gr-qc/0008026/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The LIGO-II gravitational-wave interferometers (ca. 2006--2008) are designed to have sensitivities at about the standard quantum limit (SQL) near 100 Hz. This paper describes and analyzes possible designs for subsequent, LIGO-III interferometers that can beat the SQL. These designs are identical to a conventional broad-band interferometer (without signal recycling), except for new input and/or output optics. Three designs are analyzed: (i) a \"squeezed-input interferometer\" (conceived by Unruh based on earlier work of Caves) in which squeezed vacuum with frequency-dependent (FD) squeeze angle i","authors_text":"2), (2) University of California, (3) Texas A&M University, (4) Moscow State University), Andrey B. Matsko (3), Berkeley, H.J. Kimble (1), Kip S. Thorne (1), Sergey P. Vyatchanin (4) ((1) California Institute of Technology, Yuri Levin (1","cross_cats":["quant-ph"],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2000-08-11T06:07:43Z","title":"Conversion of conventional gravitational-wave interferometers into QND interferometers by modifying their input and/or output optics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0008026","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:b0f25cd29ed6a1d7164bf33458a34c9f5a245ba2f47bbadf0a1b99ab0604da2d","target":"record","created_at":"2026-07-04T16:19:40Z","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":"61063e9319564f39ee8cdceef1c70202dbba363e4e865e2224f62163474c9653","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2000-08-11T06:07:43Z","title_canon_sha256":"506b600aa309115ad9a63276f2e5e3ba18c1bb74f78e351c8cffe66cca8f5e02"},"schema_version":"1.0","source":{"id":"gr-qc/0008026","kind":"arxiv","version":2}},"canonical_sha256":"dea3fb3a68c3b27fc6957da70796ffc01f2c4d13ead04b7b801a9b693d9a1e24","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dea3fb3a68c3b27fc6957da70796ffc01f2c4d13ead04b7b801a9b693d9a1e24","first_computed_at":"2026-07-04T16:19:40.986838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:19:40.986838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JjLOzGIwM6GfHKfuqfYkzGZ5d6zZkBrS9Khaqq6Par0PYc1+LvRkSGkkG2gZqATf4B2POrg1wBmu8367OFdxDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:19:40.987264Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0008026","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0f25cd29ed6a1d7164bf33458a34c9f5a245ba2f47bbadf0a1b99ab0604da2d","sha256:dbabaeca4a1df065b16a84361e3b6876a8e1e111e57f82dbca771bebe333cc7b"],"state_sha256":"f7f557e525522a672cba8739f8b55f550f9869c29147536e7da0e23b13ef46c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pC0RlK+7BMaTrjtGRrcrGl6TaPE0bse/xETrQvu/ZICRfr7dV9Gk5eXQliwHj/D0NWq6zqekGiDMCMcrEcZuDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T21:39:08.022567Z","bundle_sha256":"e2d39db1be234c172a5ef776ae2864e3cefd186df2d1be9fcc1028faff13b71b"}}