{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:BNHXR6F4RWQS6ALUINB6NYCNMM","short_pith_number":"pith:BNHXR6F4","schema_version":"1.0","canonical_sha256":"0b4f78f8bc8da12f01744343e6e04d632a1d9dc017ba115718ea16784a81a6d3","source":{"kind":"arxiv","id":"1609.07336","version":1},"attestation_state":"computed","paper":{"title":"Entanglement and nonclassicality in four-mode Gaussian states generated via parametric down-conversion and frequency up-conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alessia Allevi, Ievgen I. Arkhipov, Jan Pe\\v{r}ina Jr., Maria Bondani, Ond\\v{r}ej Haderka","submitted_at":"2016-09-23T12:31:26Z","abstract_excerpt":"Multipartite entanglement and nonclassicality of four-mode Gaussian states generated in two simultaneous nonlinear processes involving parametric down-conversion and frequency up-conversion are analyzed assuming the vacuum as the initial state. Suitable conditions for the generation of highly entangled states are found. Transfer of the entanglement from the down-converted modes into the up-converted ones is also suggested. The analysis of the whole set of states reveals that sub-shot-noise intensity correlations between the equally-populated down-converted modes, as well as the equally-populat"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1609.07336","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-23T12:31:26Z","cross_cats_sorted":[],"title_canon_sha256":"a45a18349e3e56af9983f7e914f6de1ccd5c5cefcdd0cb1837346f4df432a79e","abstract_canon_sha256":"4d29e137ee81e5f198b085e7bb4e2a82b2fc1c6dd485dbeb03875b89fb865721"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:01.612144Z","signature_b64":"52CzTTm7R9hlTnPw0vpo0b0tRoTQ+l+Ut9JHL6IBX9Np/hRZLpA1g7DkezfQ7iuclfdq2RTj7+/ACTRouJxcAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b4f78f8bc8da12f01744343e6e04d632a1d9dc017ba115718ea16784a81a6d3","last_reissued_at":"2026-05-18T01:04:01.611433Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:01.611433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entanglement and nonclassicality in four-mode Gaussian states generated via parametric down-conversion and frequency up-conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alessia Allevi, Ievgen I. Arkhipov, Jan Pe\\v{r}ina Jr., Maria Bondani, Ond\\v{r}ej Haderka","submitted_at":"2016-09-23T12:31:26Z","abstract_excerpt":"Multipartite entanglement and nonclassicality of four-mode Gaussian states generated in two simultaneous nonlinear processes involving parametric down-conversion and frequency up-conversion are analyzed assuming the vacuum as the initial state. Suitable conditions for the generation of highly entangled states are found. Transfer of the entanglement from the down-converted modes into the up-converted ones is also suggested. The analysis of the whole set of states reveals that sub-shot-noise intensity correlations between the equally-populated down-converted modes, as well as the equally-populat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.07336","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1609.07336","created_at":"2026-05-18T01:04:01.611545+00:00"},{"alias_kind":"arxiv_version","alias_value":"1609.07336v1","created_at":"2026-05-18T01:04:01.611545+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.07336","created_at":"2026-05-18T01:04:01.611545+00:00"},{"alias_kind":"pith_short_12","alias_value":"BNHXR6F4RWQS","created_at":"2026-05-18T12:30:07.202191+00:00"},{"alias_kind":"pith_short_16","alias_value":"BNHXR6F4RWQS6ALU","created_at":"2026-05-18T12:30:07.202191+00:00"},{"alias_kind":"pith_short_8","alias_value":"BNHXR6F4","created_at":"2026-05-18T12:30:07.202191+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM","json":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM.json","graph_json":"https://pith.science/api/pith-number/BNHXR6F4RWQS6ALUINB6NYCNMM/graph.json","events_json":"https://pith.science/api/pith-number/BNHXR6F4RWQS6ALUINB6NYCNMM/events.json","paper":"https://pith.science/paper/BNHXR6F4"},"agent_actions":{"view_html":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM","download_json":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM.json","view_paper":"https://pith.science/paper/BNHXR6F4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1609.07336&json=true","fetch_graph":"https://pith.science/api/pith-number/BNHXR6F4RWQS6ALUINB6NYCNMM/graph.json","fetch_events":"https://pith.science/api/pith-number/BNHXR6F4RWQS6ALUINB6NYCNMM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM/action/storage_attestation","attest_author":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM/action/author_attestation","sign_citation":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM/action/citation_signature","submit_replication":"https://pith.science/pith/BNHXR6F4RWQS6ALUINB6NYCNMM/action/replication_record"}},"created_at":"2026-05-18T01:04:01.611545+00:00","updated_at":"2026-05-18T01:04:01.611545+00:00"}