{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:6TSKAGKZ3QQH2XSXVFHI34KJFJ","short_pith_number":"pith:6TSKAGKZ","canonical_record":{"source":{"id":"0909.5386","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-29T17:08:25Z","cross_cats_sorted":[],"title_canon_sha256":"910276eb60138710c432bcf2b1351ba6377cb5ee88e40ede0cc4c84ce4aa3acf","abstract_canon_sha256":"2249eb8a4042be681b3252fd4a4307a44cf49d7e0029dea88437a36037fb8b3f"},"schema_version":"1.0"},"canonical_sha256":"f4e4a01959dc207d5e57a94e8df1492a6cd788ea496930dd6e9827420d23eed9","source":{"kind":"arxiv","id":"0909.5386","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5386","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5386v1","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5386","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"pith_short_12","alias_value":"6TSKAGKZ3QQH","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"6TSKAGKZ3QQH2XSX","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"6TSKAGKZ","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:6TSKAGKZ3QQH2XSXVFHI34KJFJ","target":"record","payload":{"canonical_record":{"source":{"id":"0909.5386","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-29T17:08:25Z","cross_cats_sorted":[],"title_canon_sha256":"910276eb60138710c432bcf2b1351ba6377cb5ee88e40ede0cc4c84ce4aa3acf","abstract_canon_sha256":"2249eb8a4042be681b3252fd4a4307a44cf49d7e0029dea88437a36037fb8b3f"},"schema_version":"1.0"},"canonical_sha256":"f4e4a01959dc207d5e57a94e8df1492a6cd788ea496930dd6e9827420d23eed9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:36.382866Z","signature_b64":"TYhyfSQaa5PzlXmDl3m6xEYuoyJZgW/99cHSpl5uqKZuTgGc+/bzriM/Ch+a5I2rp3n6YdpyzkynITIwS6zSBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4e4a01959dc207d5e57a94e8df1492a6cd788ea496930dd6e9827420d23eed9","last_reissued_at":"2026-05-18T02:11:36.382085Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:36.382085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.5386","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":"2026-05-18T02:11:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lacvQYvxWvBnG2PLailgF7jUsF0GwHmViOzBt0r5B4Scc9+hGNn8VEUzrwg2WFtu912NuXMtFYsswpzGAic8Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T00:25:33.027578Z"},"content_sha256":"7bb873162703d97f97f08ee52ff5297e13bb4f6a6120beb45f960f36f1595433","schema_version":"1.0","event_id":"sha256:7bb873162703d97f97f08ee52ff5297e13bb4f6a6120beb45f960f36f1595433"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:6TSKAGKZ3QQH2XSXVFHI34KJFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of squeezed states with strong photon number oscillations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Henning Vahlbruch, Karsten Danzmann, Moritz Mehmet, Nico Lastzka, Roman Schnabel","submitted_at":"2009-09-29T17:08:25Z","abstract_excerpt":"Squeezed states of light constitute an important nonclassical resource in the field of high-precision measurements, e.g. gravitational wave detection, as well as in the field of quantum information, e.g. for teleportation, quantum cryptography, and distribution of entanglement in quantum computation networks. Strong squeezing in combination with high purity, high bandwidth and high spatial mode quality is desirable in order to achieve significantly improved performances contrasting any classical protocols. Here we report on the observation of the strongest squeezing to date of 11.5 dB, togethe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5386","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":"2026-05-18T02:11:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WwWzsLhXkNbyHEtc7/7wKKI2+nCb8jYGjwM73kWC4Ta4fX+ll7UO+SRKwBxGlhgCH5tPcMqprgPxjdCvjEO/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T00:25:33.028260Z"},"content_sha256":"ff94da25d0e3b7a1eb33961f1a3b6b3386caf419a1047c58c8d38bdd5bd766e1","schema_version":"1.0","event_id":"sha256:ff94da25d0e3b7a1eb33961f1a3b6b3386caf419a1047c58c8d38bdd5bd766e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/bundle.json","state_url":"https://pith.science/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/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":"2026-06-07T00:25:33Z","links":{"resolver":"https://pith.science/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ","bundle":"https://pith.science/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/bundle.json","state":"https://pith.science/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6TSKAGKZ3QQH2XSXVFHI34KJFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:6TSKAGKZ3QQH2XSXVFHI34KJFJ","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":"2249eb8a4042be681b3252fd4a4307a44cf49d7e0029dea88437a36037fb8b3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-29T17:08:25Z","title_canon_sha256":"910276eb60138710c432bcf2b1351ba6377cb5ee88e40ede0cc4c84ce4aa3acf"},"schema_version":"1.0","source":{"id":"0909.5386","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5386","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5386v1","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5386","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"pith_short_12","alias_value":"6TSKAGKZ3QQH","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"6TSKAGKZ3QQH2XSX","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"6TSKAGKZ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:ff94da25d0e3b7a1eb33961f1a3b6b3386caf419a1047c58c8d38bdd5bd766e1","target":"graph","created_at":"2026-05-18T02:11:36Z","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":"Squeezed states of light constitute an important nonclassical resource in the field of high-precision measurements, e.g. gravitational wave detection, as well as in the field of quantum information, e.g. for teleportation, quantum cryptography, and distribution of entanglement in quantum computation networks. Strong squeezing in combination with high purity, high bandwidth and high spatial mode quality is desirable in order to achieve significantly improved performances contrasting any classical protocols. Here we report on the observation of the strongest squeezing to date of 11.5 dB, togethe","authors_text":"Henning Vahlbruch, Karsten Danzmann, Moritz Mehmet, Nico Lastzka, Roman Schnabel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-29T17:08:25Z","title":"Observation of squeezed states with strong photon number oscillations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5386","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":"sha256:7bb873162703d97f97f08ee52ff5297e13bb4f6a6120beb45f960f36f1595433","target":"record","created_at":"2026-05-18T02:11:36Z","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":"2249eb8a4042be681b3252fd4a4307a44cf49d7e0029dea88437a36037fb8b3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-29T17:08:25Z","title_canon_sha256":"910276eb60138710c432bcf2b1351ba6377cb5ee88e40ede0cc4c84ce4aa3acf"},"schema_version":"1.0","source":{"id":"0909.5386","kind":"arxiv","version":1}},"canonical_sha256":"f4e4a01959dc207d5e57a94e8df1492a6cd788ea496930dd6e9827420d23eed9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4e4a01959dc207d5e57a94e8df1492a6cd788ea496930dd6e9827420d23eed9","first_computed_at":"2026-05-18T02:11:36.382085Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:36.382085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TYhyfSQaa5PzlXmDl3m6xEYuoyJZgW/99cHSpl5uqKZuTgGc+/bzriM/Ch+a5I2rp3n6YdpyzkynITIwS6zSBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:36.382866Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.5386","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7bb873162703d97f97f08ee52ff5297e13bb4f6a6120beb45f960f36f1595433","sha256:ff94da25d0e3b7a1eb33961f1a3b6b3386caf419a1047c58c8d38bdd5bd766e1"],"state_sha256":"95c323b2819b2395856977183c7535423457a8782a432f5206a0ef13a519eea7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JvmCoPjhrSKdfMqi+TB/QiMvCO5gFi3hSaWLlecZaHD1gAT7O5+Sh4pXWzLQjxLDNLBLdpZS+irUsED2mR++BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T00:25:33.035715Z","bundle_sha256":"4e3bc922f6975fb3766c13217547401c44ef277e707ebb209580e387e1da9d8b"}}