{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:QSK3K6T2BSNDJTTRC75SWEJM62","short_pith_number":"pith:QSK3K6T2","canonical_record":{"source":{"id":"1703.09890","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-29T05:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"a002abca417863b5811640353acbf81d614b5998de78f916d4536e5df58e80af","abstract_canon_sha256":"b0a9d2a295f05d28cd2ab6beae4c617b6e001bf470b1c956eb313e403dbd8b29"},"schema_version":"1.0"},"canonical_sha256":"8495b57a7a0c9a34ce7117fb2b112cf6969fe9aa42671a6ef8cee9feeb4f65f9","source":{"kind":"arxiv","id":"1703.09890","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.09890","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"arxiv_version","alias_value":"1703.09890v2","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.09890","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"pith_short_12","alias_value":"QSK3K6T2BSND","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QSK3K6T2BSNDJTTR","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QSK3K6T2","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:QSK3K6T2BSNDJTTRC75SWEJM62","target":"record","payload":{"canonical_record":{"source":{"id":"1703.09890","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-29T05:43:14Z","cross_cats_sorted":[],"title_canon_sha256":"a002abca417863b5811640353acbf81d614b5998de78f916d4536e5df58e80af","abstract_canon_sha256":"b0a9d2a295f05d28cd2ab6beae4c617b6e001bf470b1c956eb313e403dbd8b29"},"schema_version":"1.0"},"canonical_sha256":"8495b57a7a0c9a34ce7117fb2b112cf6969fe9aa42671a6ef8cee9feeb4f65f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:45.347052Z","signature_b64":"spkgXyL2cAiS24PxLUXMrPAjHBUNJW/87g9jmLeJEIpDpW3X0EwuG44UOQs4ASpN2R0mPdKf4d7CayGF+kSFAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8495b57a7a0c9a34ce7117fb2b112cf6969fe9aa42671a6ef8cee9feeb4f65f9","last_reissued_at":"2026-05-18T00:30:45.346345Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:45.346345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.09890","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":"2026-05-18T00:30:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3T7r5yxM25P39MhbX842wER4eXYQq81faadamhxcms6OdAUDYU8f4/5QJodm6bfgqmQmzKfOCHcjZSoPQbrJCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T22:27:06.521187Z"},"content_sha256":"fc6b8b2f886bc293d29d4013706e2267674e4640033d8498bbb99ce6d85d0026","schema_version":"1.0","event_id":"sha256:fc6b8b2f886bc293d29d4013706e2267674e4640033d8498bbb99ce6d85d0026"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:QSK3K6T2BSNDJTTRC75SWEJM62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical Density-Enhanced Squeezed Light Generation without Optical Cavities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ite A. Yu, Ray-Kuang Lee, You-Lin Chuang","submitted_at":"2017-03-29T05:43:14Z","abstract_excerpt":"To achieve high degree of quantum noise squeezing, an optical cavity is often employed to enhance the interaction time between light and matter. Here, we propose to utilize the effect of coherent population trapping (CPT) to directly generate squeezed light without any optical cavity. Combined with the slow propagation speed of light in a CPT medium, a coherent state passing through an atomic ensemble with a high optical density (OD) can evolve into a highly squeezed state even in a single passage. Our study reveals that noise squeezing of more than $10$ dB can be achieved with an OD of 1,000,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.09890","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":"2026-05-18T00:30:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zUfIpuMkPAVZdAr3d7rmCnlPhY9AUUjI1WJlMWNYz3rYkw9mVLXMfM95KBD7bnBMQAcW+rEoGXROhAGn7i2NCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T22:27:06.521805Z"},"content_sha256":"d8652514d4069b689843f67d4571aaeae273470e12b3d922402426e8e0627e99","schema_version":"1.0","event_id":"sha256:d8652514d4069b689843f67d4571aaeae273470e12b3d922402426e8e0627e99"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QSK3K6T2BSNDJTTRC75SWEJM62/bundle.json","state_url":"https://pith.science/pith/QSK3K6T2BSNDJTTRC75SWEJM62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QSK3K6T2BSNDJTTRC75SWEJM62/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":"2026-06-04T22:27:06Z","links":{"resolver":"https://pith.science/pith/QSK3K6T2BSNDJTTRC75SWEJM62","bundle":"https://pith.science/pith/QSK3K6T2BSNDJTTRC75SWEJM62/bundle.json","state":"https://pith.science/pith/QSK3K6T2BSNDJTTRC75SWEJM62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QSK3K6T2BSNDJTTRC75SWEJM62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QSK3K6T2BSNDJTTRC75SWEJM62","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":"b0a9d2a295f05d28cd2ab6beae4c617b6e001bf470b1c956eb313e403dbd8b29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-29T05:43:14Z","title_canon_sha256":"a002abca417863b5811640353acbf81d614b5998de78f916d4536e5df58e80af"},"schema_version":"1.0","source":{"id":"1703.09890","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.09890","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"arxiv_version","alias_value":"1703.09890v2","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.09890","created_at":"2026-05-18T00:30:45Z"},{"alias_kind":"pith_short_12","alias_value":"QSK3K6T2BSND","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QSK3K6T2BSNDJTTR","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QSK3K6T2","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:d8652514d4069b689843f67d4571aaeae273470e12b3d922402426e8e0627e99","target":"graph","created_at":"2026-05-18T00:30:45Z","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":"To achieve high degree of quantum noise squeezing, an optical cavity is often employed to enhance the interaction time between light and matter. Here, we propose to utilize the effect of coherent population trapping (CPT) to directly generate squeezed light without any optical cavity. Combined with the slow propagation speed of light in a CPT medium, a coherent state passing through an atomic ensemble with a high optical density (OD) can evolve into a highly squeezed state even in a single passage. Our study reveals that noise squeezing of more than $10$ dB can be achieved with an OD of 1,000,","authors_text":"Ite A. Yu, Ray-Kuang Lee, You-Lin Chuang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-29T05:43:14Z","title":"Optical Density-Enhanced Squeezed Light Generation without Optical Cavities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.09890","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:fc6b8b2f886bc293d29d4013706e2267674e4640033d8498bbb99ce6d85d0026","target":"record","created_at":"2026-05-18T00:30:45Z","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":"b0a9d2a295f05d28cd2ab6beae4c617b6e001bf470b1c956eb313e403dbd8b29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-29T05:43:14Z","title_canon_sha256":"a002abca417863b5811640353acbf81d614b5998de78f916d4536e5df58e80af"},"schema_version":"1.0","source":{"id":"1703.09890","kind":"arxiv","version":2}},"canonical_sha256":"8495b57a7a0c9a34ce7117fb2b112cf6969fe9aa42671a6ef8cee9feeb4f65f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8495b57a7a0c9a34ce7117fb2b112cf6969fe9aa42671a6ef8cee9feeb4f65f9","first_computed_at":"2026-05-18T00:30:45.346345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:45.346345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"spkgXyL2cAiS24PxLUXMrPAjHBUNJW/87g9jmLeJEIpDpW3X0EwuG44UOQs4ASpN2R0mPdKf4d7CayGF+kSFAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:45.347052Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.09890","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc6b8b2f886bc293d29d4013706e2267674e4640033d8498bbb99ce6d85d0026","sha256:d8652514d4069b689843f67d4571aaeae273470e12b3d922402426e8e0627e99"],"state_sha256":"362e1c97573e84227a81aca0db4366002bafe024637bd69c511d03cedae0acb4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0sF1EC/tyKVqulRATi56p8rvG3HyIZYV7TIOD0s0jsHSfRQqfx3vhupRLO4CSp4vosyXWANqksfJ6InIrF/XAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T22:27:06.525038Z","bundle_sha256":"9a0854e6e12564baa2c0f3aaaff42ec4f1927e42359b2d6caad2e47eabe913df"}}