{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:PYKN5PU3H37VR3ZHEZEC3I3ARN","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":"d37c936940ca517c047d42064ed082e225a24b9fff0fb6698f7559d7b919bd4c","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-02-27T17:35:51Z","title_canon_sha256":"4e422d963668251fb14e2dbcb598d26f793825992c6c3457ad0816f85dcaf2fb"},"schema_version":"1.0","source":{"id":"quant-ph/0702258","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0702258","created_at":"2026-07-04T15:06:38Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0702258v4","created_at":"2026-07-04T15:06:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0702258","created_at":"2026-07-04T15:06:38Z"},{"alias_kind":"pith_short_12","alias_value":"PYKN5PU3H37V","created_at":"2026-07-04T15:06:38Z"},{"alias_kind":"pith_short_16","alias_value":"PYKN5PU3H37VR3ZH","created_at":"2026-07-04T15:06:38Z"},{"alias_kind":"pith_short_8","alias_value":"PYKN5PU3","created_at":"2026-07-04T15:06:38Z"}],"graph_snapshots":[{"event_id":"sha256:22e12eb67ed0fe0459cd811956aabb6c8b638d6147e861786a66b074e1b9eb0c","target":"graph","created_at":"2026-07-04T15:06:38Z","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/quant-ph/0702258/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that the generation of entanglement of two heavily macroscopic mirrors with masses of up to several kilograms are feasible with state of the art techniques of high-precision laser interferometry. The basis of such a demonstration would be a Michelson interferometer with suspended mirrors and simultaneous homodyne detections at both interferometer output ports. We present the connection between the generation of entanglement and the Standard Quantum Limit (SQL) for a free mass. The SQL is a well-known reference limit in operating interferometers for gravitational-wave detection and prov","authors_text":"Helge Mueller-Ebhardt, Henning Rehbein, Karsten Danzmann, Roman Schnabel, Yanbei Chen","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2007-02-27T17:35:51Z","title":"Entanglement of macroscopic test masses and the Standard Quantum Limit in laser interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0702258","kind":"arxiv","version":4},"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":"sha256:318bef14b5ebfefb47070f6328dc755c4c61d9d2ea34716f8b22c32cb8294304","target":"record","created_at":"2026-07-04T15:06:38Z","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":"d37c936940ca517c047d42064ed082e225a24b9fff0fb6698f7559d7b919bd4c","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-02-27T17:35:51Z","title_canon_sha256":"4e422d963668251fb14e2dbcb598d26f793825992c6c3457ad0816f85dcaf2fb"},"schema_version":"1.0","source":{"id":"quant-ph/0702258","kind":"arxiv","version":4}},"canonical_sha256":"7e14debe9b3eff58ef2726482da3608b57d39ff44de0fb8392efd50c3c932562","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e14debe9b3eff58ef2726482da3608b57d39ff44de0fb8392efd50c3c932562","first_computed_at":"2026-07-04T15:06:38.665827Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:06:38.665827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XX1UlFawFECnot7bIaHkOyYDWkfQLhfQ4lp9iH+YmxRvxecfJsangte0dTipuz75EMLIVM6bUOee3mw0VvvmBg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:06:38.666255Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0702258","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:318bef14b5ebfefb47070f6328dc755c4c61d9d2ea34716f8b22c32cb8294304","sha256:22e12eb67ed0fe0459cd811956aabb6c8b638d6147e861786a66b074e1b9eb0c"],"state_sha256":"92741633544c8020e3aa15f7d6b8eac4925ba675b7bc01d8d7b54ce9bbdd410f"}