{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:EO4UPSPM5SBQOVF3FG7KML4QWB","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":"917240676467a3e908c4c8d4347d5c0f814098c18ce5a15893af767cde64fa72","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-31T11:42:19Z","title_canon_sha256":"aed4cd29cadb7367a9c760721e5c073da9a85deaed19fd8f2436f9d29e0fc304"},"schema_version":"1.0","source":{"id":"2607.29313","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.29313","created_at":"2026-08-03T01:24:31Z"},{"alias_kind":"arxiv_version","alias_value":"2607.29313v1","created_at":"2026-08-03T01:24:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.29313","created_at":"2026-08-03T01:24:31Z"},{"alias_kind":"pith_short_12","alias_value":"EO4UPSPM5SBQ","created_at":"2026-08-03T01:24:31Z"},{"alias_kind":"pith_short_16","alias_value":"EO4UPSPM5SBQOVF3","created_at":"2026-08-03T01:24:31Z"},{"alias_kind":"pith_short_8","alias_value":"EO4UPSPM","created_at":"2026-08-03T01:24:31Z"}],"graph_snapshots":[{"event_id":"sha256:62e7d493e5598aaf9b162edf54d71c18af2924636ac01234bf5b0137347cd8c6","target":"graph","created_at":"2026-08-03T01:24:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.29313/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum nonlinear optics seeks to harness strong photon-photon interactions for scalable quantum technologies, although dissipative losses still pose a major barrier to near-unity conversion efficiency. Here, we bridge non-Hermitian physics with the quantum nonlinear domain by exploiting perfect absorption to identify and optimize few-photon nonlinear processes. We theoretically investigate two circuit QED systems, operating in the light-matter ultrastrong coupling regime. The first (i) enables simultaneous two-atom excitations by single photons, while the second (ii) realizes the strong coupl","authors_text":"Andrea Zappal\\'a, Daniele Lamberto, Franco Nori, Salvatore Savasta, Samuel Napoli","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-31T11:42:19Z","title":"Non-Hermitian Quantum Nonlinear Optics with Single Photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.29313","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":"sha256:382cff8f5269c2e3f70efeefdc303d68498615746ca6e07472805fe582319896","target":"record","created_at":"2026-08-03T01:24:31Z","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":"917240676467a3e908c4c8d4347d5c0f814098c18ce5a15893af767cde64fa72","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-31T11:42:19Z","title_canon_sha256":"aed4cd29cadb7367a9c760721e5c073da9a85deaed19fd8f2436f9d29e0fc304"},"schema_version":"1.0","source":{"id":"2607.29313","kind":"arxiv","version":1}},"canonical_sha256":"23b947c9ecec830754bb29bea62f90b0715ed95e40623b05c0406d1a7affb3cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23b947c9ecec830754bb29bea62f90b0715ed95e40623b05c0406d1a7affb3cb","first_computed_at":"2026-08-03T01:24:31.863448Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-03T01:24:31.863448Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+3tMAhCUpJNL/mRSzPD9pUpEZc7IHszRZYwnHjrclcAtI4qNqqQgjhyIVBN/7YigUM6ETpWeyT8p+iV7FfGDBA==","signature_status":"signed_v1","signed_at":"2026-08-03T01:24:31.864877Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.29313","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:382cff8f5269c2e3f70efeefdc303d68498615746ca6e07472805fe582319896","sha256:62e7d493e5598aaf9b162edf54d71c18af2924636ac01234bf5b0137347cd8c6"],"state_sha256":"1588552a06266226067a6528f194b04c90b7461a1415cc0899e12ae2137337c9"}