{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:UR2HHG7HXYFFEKVEEKQ4LOCHHL","short_pith_number":"pith:UR2HHG7H","schema_version":"1.0","canonical_sha256":"a474739be7be0a522aa422a1c5b8473ae5b47cc854c02a1db7a96d0b1eb2eb8e","source":{"kind":"arxiv","id":"2605.23617","version":1},"attestation_state":"computed","paper":{"title":"Multiphoton heralding generates large-amplitude squeezed Schr\\\"odinger cat states and parity-selective Fock superpositions from squeezed vacuum via an OPA","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ming-Yan Sun, Xiao-Xi Yao, Yusuf Turek","submitted_at":"2026-05-22T13:25:11Z","abstract_excerpt":"We propose a multiphoton heralding scheme using an optical parametric amplifier (OPA) that converts squeezed vacuum into two families of non-Gaussian states: large-amplitude squeezed Schr\\\"odinger cat states and low-order parity-selective Fock superpositions. By injecting m photons into the idler port and detecting n photons at the output, effective high-order photon subtraction is realized in a single OPA device. The heralded states exhibit strong Wigner negativity and high phase-space complexity. Remarkably, under photon loss, the complexity remains substantial even after negativity vanishes"},"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":"2605.23617","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-22T13:25:11Z","cross_cats_sorted":[],"title_canon_sha256":"59298b2e54ad78a42ba8c89a530b839078697d48f9f6314dc40ea24d97f2b919","abstract_canon_sha256":"20ead31599d6f93b47ac72bf67345a22f8b2e3327d4b165c954d358b1743d7d1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-25T02:02:22.248164Z","signature_b64":"aJBm4z9vOqEkX/4ajJi0nxDSN2Wa5SKttfLX0WumCHdmbkd2e4W2lr3tcvYOYnxE+9G+s5nNi+YGaqRM6DttDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a474739be7be0a522aa422a1c5b8473ae5b47cc854c02a1db7a96d0b1eb2eb8e","last_reissued_at":"2026-05-25T02:02:22.247540Z","signature_status":"signed_v1","first_computed_at":"2026-05-25T02:02:22.247540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Multiphoton heralding generates large-amplitude squeezed Schr\\\"odinger cat states and parity-selective Fock superpositions from squeezed vacuum via an OPA","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ming-Yan Sun, Xiao-Xi Yao, Yusuf Turek","submitted_at":"2026-05-22T13:25:11Z","abstract_excerpt":"We propose a multiphoton heralding scheme using an optical parametric amplifier (OPA) that converts squeezed vacuum into two families of non-Gaussian states: large-amplitude squeezed Schr\\\"odinger cat states and low-order parity-selective Fock superpositions. By injecting m photons into the idler port and detecting n photons at the output, effective high-order photon subtraction is realized in a single OPA device. The heralded states exhibit strong Wigner negativity and high phase-space complexity. Remarkably, under photon loss, the complexity remains substantial even after negativity vanishes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.23617","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.23617/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2605.23617","created_at":"2026-05-25T02:02:22.247661+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.23617v1","created_at":"2026-05-25T02:02:22.247661+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.23617","created_at":"2026-05-25T02:02:22.247661+00:00"},{"alias_kind":"pith_short_12","alias_value":"UR2HHG7HXYFF","created_at":"2026-05-25T02:02:22.247661+00:00"},{"alias_kind":"pith_short_16","alias_value":"UR2HHG7HXYFFEKVE","created_at":"2026-05-25T02:02:22.247661+00:00"},{"alias_kind":"pith_short_8","alias_value":"UR2HHG7H","created_at":"2026-05-25T02:02:22.247661+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.23617","citing_title":"Multiphoton heralding generates large-amplitude squeezed Schr\\\"odinger cat states and parity-selective Fock superpositions from squeezed vacuum via an OPA","ref_index":1,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL","json":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL.json","graph_json":"https://pith.science/api/pith-number/UR2HHG7HXYFFEKVEEKQ4LOCHHL/graph.json","events_json":"https://pith.science/api/pith-number/UR2HHG7HXYFFEKVEEKQ4LOCHHL/events.json","paper":"https://pith.science/paper/UR2HHG7H"},"agent_actions":{"view_html":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL","download_json":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL.json","view_paper":"https://pith.science/paper/UR2HHG7H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.23617&json=true","fetch_graph":"https://pith.science/api/pith-number/UR2HHG7HXYFFEKVEEKQ4LOCHHL/graph.json","fetch_events":"https://pith.science/api/pith-number/UR2HHG7HXYFFEKVEEKQ4LOCHHL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL/action/storage_attestation","attest_author":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL/action/author_attestation","sign_citation":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL/action/citation_signature","submit_replication":"https://pith.science/pith/UR2HHG7HXYFFEKVEEKQ4LOCHHL/action/replication_record"}},"created_at":"2026-05-25T02:02:22.247661+00:00","updated_at":"2026-05-25T02:02:22.247661+00:00"}