{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:X3GQS47KPPMLZBYPVQYTWUFKC5","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":"59188f74742f47aa92d139cb0661a88a5214c686c5e2e73e121d1a2f6ffe79fc","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-17T10:44:45Z","title_canon_sha256":"71173edffa5b12a3f6412282fb9e632e5dc2cd8dd1b771126e1d63a5dbba8285"},"schema_version":"1.0","source":{"id":"1309.4254","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4254","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4254v1","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4254","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"pith_short_12","alias_value":"X3GQS47KPPML","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"X3GQS47KPPMLZBYP","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"X3GQS47K","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:f77bf1a0ab13281b36e5c25d2e1b8895b9f562345fa53aa12660b9af22746d87","target":"graph","created_at":"2026-05-18T01:47:36Z","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":"A photonic process named as \"quantum state joining\" has been recently experimentally demonstrated [C. Vitelli et al., Nature Photon. 7, 521 (2013)] that corresponds to the transfer of the internal two-dimensional quantum states of two input photons, i.e., two photonic qubits, into the four-dimensional quantum state of a single photon, i.e., a photonic ququart. A scheme for the inverse process, namely \"quantum state splitting\", has also been theoretically proposed. Both processes can be iterated in a cascaded layout, to obtain the joining and/or splitting of more than two qubits, thus leading t","authors_text":"Chiara Vitelli, Elsa Passaro, Enrico Santamato, Fabio Sciarrino, Lorenzo Marrucci, Nicolo' Spagnolo","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-17T10:44:45Z","title":"Joining and splitting the quantum states of photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4254","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":"sha256:71571406a7d14eeca98083e96348d907a09540ffc07ae1b5025c7a8fb418712f","target":"record","created_at":"2026-05-18T01:47:36Z","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":"59188f74742f47aa92d139cb0661a88a5214c686c5e2e73e121d1a2f6ffe79fc","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-17T10:44:45Z","title_canon_sha256":"71173edffa5b12a3f6412282fb9e632e5dc2cd8dd1b771126e1d63a5dbba8285"},"schema_version":"1.0","source":{"id":"1309.4254","kind":"arxiv","version":1}},"canonical_sha256":"becd0973ea7bd8bc870fac313b50aa175a20ea2a3955ee4fd578cc20523d4a93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"becd0973ea7bd8bc870fac313b50aa175a20ea2a3955ee4fd578cc20523d4a93","first_computed_at":"2026-05-18T01:47:36.753680Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:36.753680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lsDX2TCrlak/v2hQaHIB1nibMy9GkXsltdETWqpCChnAU1IbuSc1fxZXlgoNhSI3DfYPl/Dobz8pmTIcbgLqAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:36.754339Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.4254","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71571406a7d14eeca98083e96348d907a09540ffc07ae1b5025c7a8fb418712f","sha256:f77bf1a0ab13281b36e5c25d2e1b8895b9f562345fa53aa12660b9af22746d87"],"state_sha256":"995dbfefbcd475e1939a00cb4a1dc5a56addb32cefb0c483a3f81401d4189b82"}