{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OT7IXL44CGC466GK4HKZWOKDI7","short_pith_number":"pith:OT7IXL44","canonical_record":{"source":{"id":"1804.03306","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-10T01:44:24Z","cross_cats_sorted":[],"title_canon_sha256":"ee67faf88d7773df406664773989456f2c4c6e5c26e91247ce5f9c2f5c27876d","abstract_canon_sha256":"c9a0f40fc4333c15d4cf85872a9c085dbaa03cc91aa2792209a4e54257311d0d"},"schema_version":"1.0"},"canonical_sha256":"74fe8baf9c1185cf78cae1d59b394347da167a99afba88ae36a1cb6e8086f760","source":{"kind":"arxiv","id":"1804.03306","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.03306","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.03306v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.03306","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"OT7IXL44CGC4","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OT7IXL44CGC466GK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OT7IXL44","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OT7IXL44CGC466GK4HKZWOKDI7","target":"record","payload":{"canonical_record":{"source":{"id":"1804.03306","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-10T01:44:24Z","cross_cats_sorted":[],"title_canon_sha256":"ee67faf88d7773df406664773989456f2c4c6e5c26e91247ce5f9c2f5c27876d","abstract_canon_sha256":"c9a0f40fc4333c15d4cf85872a9c085dbaa03cc91aa2792209a4e54257311d0d"},"schema_version":"1.0"},"canonical_sha256":"74fe8baf9c1185cf78cae1d59b394347da167a99afba88ae36a1cb6e8086f760","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:14.661463Z","signature_b64":"Vk2aPhNYL6o/02yWrJB2lkVJ4GZWaDnFiEupbBPti9jMRULIKJoGhWRVvTqZfJal/t1f89iui4edtCd99DTiBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74fe8baf9c1185cf78cae1d59b394347da167a99afba88ae36a1cb6e8086f760","last_reissued_at":"2026-05-18T00:15:14.660886Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:14.660886Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.03306","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m7TRhb48FfkFCtaM1hqaJ0pa1K7d47vqLvJkCsUzrCKy9nSXtR8ok4oNcAoJ/vXGZPfrJZPHdVpcPyVIVZ7MCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:08:40.454213Z"},"content_sha256":"f0042145ff6cc35fdb23d0e501ba78920abea53a523b2fb44e865ee48051fb20","schema_version":"1.0","event_id":"sha256:f0042145ff6cc35fdb23d0e501ba78920abea53a523b2fb44e865ee48051fb20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OT7IXL44CGC466GK4HKZWOKDI7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Demonstration of spatial-light-modulation-based four-wave mixing in cold atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Chin-Yao Cheng, Ite A. Yu, Jia-Kang Lin, Jz-Yuan Juo, Yong-Fan Chen, Zi-Yu Liu","submitted_at":"2018-04-10T01:44:24Z","abstract_excerpt":"Long-distance quantum optical communications usually require efficient wave-mixing processes to convert the wavelengths of single photons. Many quantum applications based on electromagnetically induced transparency (EIT) have been proposed and demonstrated at the single-photon level, such as quantum memories, all-optical transistors, and cross-phase modulations. However, EIT-based four-wave mixing (FWM) in a resonant double-$\\Lambda$ configuration has a maximum conversion efficiency (CE) of 25% because of absorptive loss due to spontaneous emission. An improved scheme using spatially modulated"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.03306","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UI7eEPcu3m6PhuHgyLeo+78Ly6rOrJTIivcJ0SwFxEYN56s6aZ8brcR8C9Z4AuAp579GfUup3+Y1oeoyE9meDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:08:40.454576Z"},"content_sha256":"a417ed530f00bd01bad1ce32c92d2734451834752ac8abf84f6c664eca57f2f6","schema_version":"1.0","event_id":"sha256:a417ed530f00bd01bad1ce32c92d2734451834752ac8abf84f6c664eca57f2f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OT7IXL44CGC466GK4HKZWOKDI7/bundle.json","state_url":"https://pith.science/pith/OT7IXL44CGC466GK4HKZWOKDI7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OT7IXL44CGC466GK4HKZWOKDI7/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":"2026-06-01T12:08:40Z","links":{"resolver":"https://pith.science/pith/OT7IXL44CGC466GK4HKZWOKDI7","bundle":"https://pith.science/pith/OT7IXL44CGC466GK4HKZWOKDI7/bundle.json","state":"https://pith.science/pith/OT7IXL44CGC466GK4HKZWOKDI7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OT7IXL44CGC466GK4HKZWOKDI7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OT7IXL44CGC466GK4HKZWOKDI7","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":"c9a0f40fc4333c15d4cf85872a9c085dbaa03cc91aa2792209a4e54257311d0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-10T01:44:24Z","title_canon_sha256":"ee67faf88d7773df406664773989456f2c4c6e5c26e91247ce5f9c2f5c27876d"},"schema_version":"1.0","source":{"id":"1804.03306","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.03306","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.03306v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.03306","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"OT7IXL44CGC4","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OT7IXL44CGC466GK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OT7IXL44","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:a417ed530f00bd01bad1ce32c92d2734451834752ac8abf84f6c664eca57f2f6","target":"graph","created_at":"2026-05-18T00:15:14Z","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":"Long-distance quantum optical communications usually require efficient wave-mixing processes to convert the wavelengths of single photons. Many quantum applications based on electromagnetically induced transparency (EIT) have been proposed and demonstrated at the single-photon level, such as quantum memories, all-optical transistors, and cross-phase modulations. However, EIT-based four-wave mixing (FWM) in a resonant double-$\\Lambda$ configuration has a maximum conversion efficiency (CE) of 25% because of absorptive loss due to spontaneous emission. An improved scheme using spatially modulated","authors_text":"Chin-Yao Cheng, Ite A. Yu, Jia-Kang Lin, Jz-Yuan Juo, Yong-Fan Chen, Zi-Yu Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-10T01:44:24Z","title":"Demonstration of spatial-light-modulation-based four-wave mixing in cold atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.03306","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:f0042145ff6cc35fdb23d0e501ba78920abea53a523b2fb44e865ee48051fb20","target":"record","created_at":"2026-05-18T00:15:14Z","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":"c9a0f40fc4333c15d4cf85872a9c085dbaa03cc91aa2792209a4e54257311d0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-10T01:44:24Z","title_canon_sha256":"ee67faf88d7773df406664773989456f2c4c6e5c26e91247ce5f9c2f5c27876d"},"schema_version":"1.0","source":{"id":"1804.03306","kind":"arxiv","version":1}},"canonical_sha256":"74fe8baf9c1185cf78cae1d59b394347da167a99afba88ae36a1cb6e8086f760","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74fe8baf9c1185cf78cae1d59b394347da167a99afba88ae36a1cb6e8086f760","first_computed_at":"2026-05-18T00:15:14.660886Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:14.660886Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Vk2aPhNYL6o/02yWrJB2lkVJ4GZWaDnFiEupbBPti9jMRULIKJoGhWRVvTqZfJal/t1f89iui4edtCd99DTiBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:14.661463Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.03306","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0042145ff6cc35fdb23d0e501ba78920abea53a523b2fb44e865ee48051fb20","sha256:a417ed530f00bd01bad1ce32c92d2734451834752ac8abf84f6c664eca57f2f6"],"state_sha256":"0b511335bc3672e7681d0b463dac96f363690ff05f35eea48846b76050702d83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uX/J4NCY/exgQdJL/ObZQ1wjEsXzy/4grd60N+C8UPJ9BTqKgtquoI2cvIDB+e6MWvg5RogYPft8sZkSUnd5Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T12:08:40.456541Z","bundle_sha256":"009ddf37378b2a46f170fa16b7dff02f2d3972122f934de12c125a4b1dd60e65"}}