{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:T6I2HGI4HS6ZGSFAZAMKW4HXM6","short_pith_number":"pith:T6I2HGI4","canonical_record":{"source":{"id":"1704.03268","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-11T12:44:44Z","cross_cats_sorted":[],"title_canon_sha256":"c212570f94076c22b7a5d9a71988a81ec12dfc90d3b9dc42676ff2e8033484d5","abstract_canon_sha256":"edf56d9ca6cb30f0329d4a57c55c225b622d70b4a610ef33fdc55cd44e8af766"},"schema_version":"1.0"},"canonical_sha256":"9f91a3991c3cbd9348a0c818ab70f767af50fbbff1b501c71891df37580b3d67","source":{"kind":"arxiv","id":"1704.03268","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03268","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03268v2","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03268","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"pith_short_12","alias_value":"T6I2HGI4HS6Z","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"T6I2HGI4HS6ZGSFA","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"T6I2HGI4","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:T6I2HGI4HS6ZGSFAZAMKW4HXM6","target":"record","payload":{"canonical_record":{"source":{"id":"1704.03268","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-11T12:44:44Z","cross_cats_sorted":[],"title_canon_sha256":"c212570f94076c22b7a5d9a71988a81ec12dfc90d3b9dc42676ff2e8033484d5","abstract_canon_sha256":"edf56d9ca6cb30f0329d4a57c55c225b622d70b4a610ef33fdc55cd44e8af766"},"schema_version":"1.0"},"canonical_sha256":"9f91a3991c3cbd9348a0c818ab70f767af50fbbff1b501c71891df37580b3d67","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:33:18.811173Z","signature_b64":"VMzs4POjtFlGLODjHZn/kpRTp3+Pgt7kYjDVZAmCg9YCXBoWqNKtWKv4FJ217wPWGk0YGrlChmq4udW8dbIKAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f91a3991c3cbd9348a0c818ab70f767af50fbbff1b501c71891df37580b3d67","last_reissued_at":"2026-05-18T00:33:18.810608Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:33:18.810608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.03268","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":"2026-05-18T00:33:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KD104s3iGJAKkGFA3b8cjxHfPDSn1h5EAO57AGFcTy/C2XsPM20iQ6do9wEMUZyM1SBlraZSGBrbF+ddN2aMCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:03:42.749792Z"},"content_sha256":"e7001db840f8579e08ae3f865ff1619fc1fe4c53dd2bd5fb1ad037e821b10af3","schema_version":"1.0","event_id":"sha256:e7001db840f8579e08ae3f865ff1619fc1fe4c53dd2bd5fb1ad037e821b10af3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:T6I2HGI4HS6ZGSFAZAMKW4HXM6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarization squeezing at the audio frequency band for the Rubidium D1 line","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jinyu Liu, Jun He, Junmin Wang, Xin Wen, Yashuai Han","submitted_at":"2017-04-11T12:44:44Z","abstract_excerpt":"A 2.8-dB polarization squeezing of the Stokes operator S2 for the rubidium D1 line (795 nm) is achieved, with the lowest squeezing band at an audio frequency of 2.6 kHz. Two methods are applied for improving the squeezing towards low frequencies: an orthogonal-polarized locking beam that precludes residual unwanted interference and quantum noise locking method that stabilizes the relative phase between the squeezed vacuum and the local oscillator. The squeezing level is limited by absorption-induced losses at short wavelengths, here is 397.5 nm. The generated polarization squeezed light can be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03268","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":""},"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":"2026-05-18T00:33:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gq/PXz1oD1yJq78Za9ZaxBXLD/gesji2i0jCzL2A7VqUPXw5nBu4C41kE4kI6FJxiDnxT0If34odz94A6V5zAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:03:42.750483Z"},"content_sha256":"7e104f6c7fc79360f4141dabd549b896c0db027543b6c3278ca913a34eb982ad","schema_version":"1.0","event_id":"sha256:7e104f6c7fc79360f4141dabd549b896c0db027543b6c3278ca913a34eb982ad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/bundle.json","state_url":"https://pith.science/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/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":"2026-05-25T20:03:42Z","links":{"resolver":"https://pith.science/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6","bundle":"https://pith.science/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/bundle.json","state":"https://pith.science/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T6I2HGI4HS6ZGSFAZAMKW4HXM6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:T6I2HGI4HS6ZGSFAZAMKW4HXM6","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":"edf56d9ca6cb30f0329d4a57c55c225b622d70b4a610ef33fdc55cd44e8af766","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-11T12:44:44Z","title_canon_sha256":"c212570f94076c22b7a5d9a71988a81ec12dfc90d3b9dc42676ff2e8033484d5"},"schema_version":"1.0","source":{"id":"1704.03268","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03268","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03268v2","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03268","created_at":"2026-05-18T00:33:18Z"},{"alias_kind":"pith_short_12","alias_value":"T6I2HGI4HS6Z","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"T6I2HGI4HS6ZGSFA","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"T6I2HGI4","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:7e104f6c7fc79360f4141dabd549b896c0db027543b6c3278ca913a34eb982ad","target":"graph","created_at":"2026-05-18T00:33:18Z","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":"A 2.8-dB polarization squeezing of the Stokes operator S2 for the rubidium D1 line (795 nm) is achieved, with the lowest squeezing band at an audio frequency of 2.6 kHz. Two methods are applied for improving the squeezing towards low frequencies: an orthogonal-polarized locking beam that precludes residual unwanted interference and quantum noise locking method that stabilizes the relative phase between the squeezed vacuum and the local oscillator. The squeezing level is limited by absorption-induced losses at short wavelengths, here is 397.5 nm. The generated polarization squeezed light can be","authors_text":"Jinyu Liu, Jun He, Junmin Wang, Xin Wen, Yashuai Han","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-11T12:44:44Z","title":"Polarization squeezing at the audio frequency band for the Rubidium D1 line"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03268","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:e7001db840f8579e08ae3f865ff1619fc1fe4c53dd2bd5fb1ad037e821b10af3","target":"record","created_at":"2026-05-18T00:33:18Z","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":"edf56d9ca6cb30f0329d4a57c55c225b622d70b4a610ef33fdc55cd44e8af766","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-04-11T12:44:44Z","title_canon_sha256":"c212570f94076c22b7a5d9a71988a81ec12dfc90d3b9dc42676ff2e8033484d5"},"schema_version":"1.0","source":{"id":"1704.03268","kind":"arxiv","version":2}},"canonical_sha256":"9f91a3991c3cbd9348a0c818ab70f767af50fbbff1b501c71891df37580b3d67","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f91a3991c3cbd9348a0c818ab70f767af50fbbff1b501c71891df37580b3d67","first_computed_at":"2026-05-18T00:33:18.810608Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:33:18.810608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VMzs4POjtFlGLODjHZn/kpRTp3+Pgt7kYjDVZAmCg9YCXBoWqNKtWKv4FJ217wPWGk0YGrlChmq4udW8dbIKAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:33:18.811173Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.03268","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7001db840f8579e08ae3f865ff1619fc1fe4c53dd2bd5fb1ad037e821b10af3","sha256:7e104f6c7fc79360f4141dabd549b896c0db027543b6c3278ca913a34eb982ad"],"state_sha256":"42b7b94a3ce356b3bf5fe3546699653fd6ba20583c22a2b4eb86293cae312bd6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rtSyZrPjzpFFKruey9Pt8uCTaTNQfvHFhPFEGqeflGDTH8R6y4PQY7sWr8e7lH4ODOVbnMG1hW/1OQd4pSaRAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:03:42.753620Z","bundle_sha256":"ac1114e4b2fb2a50d29cf26a3b757df36c5e7a3a63e6f5f7b214f72861d3de46"}}