{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SPTOPATIO4K3PYHIHAXRGPTBX2","short_pith_number":"pith:SPTOPATI","canonical_record":{"source":{"id":"1311.6784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-11-26T19:35:27Z","cross_cats_sorted":[],"title_canon_sha256":"77eb005ad5744ce3f35bc644af84a880ef042847aac5606708b36ba179db4494","abstract_canon_sha256":"abea3296e127d99d888dc1fe8d7cad83f00472ada246150bd5c67937707c75dd"},"schema_version":"1.0"},"canonical_sha256":"93e6e782687715b7e0e8382f133e61bea7a7459c3e2fd81e309798c7d9279f8b","source":{"kind":"arxiv","id":"1311.6784","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6784","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6784v1","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6784","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"pith_short_12","alias_value":"SPTOPATIO4K3","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SPTOPATIO4K3PYHI","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SPTOPATI","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SPTOPATIO4K3PYHIHAXRGPTBX2","target":"record","payload":{"canonical_record":{"source":{"id":"1311.6784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-11-26T19:35:27Z","cross_cats_sorted":[],"title_canon_sha256":"77eb005ad5744ce3f35bc644af84a880ef042847aac5606708b36ba179db4494","abstract_canon_sha256":"abea3296e127d99d888dc1fe8d7cad83f00472ada246150bd5c67937707c75dd"},"schema_version":"1.0"},"canonical_sha256":"93e6e782687715b7e0e8382f133e61bea7a7459c3e2fd81e309798c7d9279f8b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:06:05.828365Z","signature_b64":"H+l5Y3HOmZ8t2OWQOiUwSyastkfznTCBfQ4RrQ5jRIaDsHYoQQpGC/8VQSyquA/3af2wkuzXmtZjO+Fhb9mlCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93e6e782687715b7e0e8382f133e61bea7a7459c3e2fd81e309798c7d9279f8b","last_reissued_at":"2026-05-18T03:06:05.827836Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:06:05.827836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.6784","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":"2026-05-18T03:06:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zwm0Ym9MeqZfa+czGf1mWemW3TJov9H1HhG2nGda2owcxm7EbtyZj4ykU3e+x9/si+t7zlKAc5BeH4YY0b/KAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T18:16:16.749510Z"},"content_sha256":"9ea4d7420acf3f662c046bacf5941113cce15bdc50952c3a0e0f6d06dc9f047f","schema_version":"1.0","event_id":"sha256:9ea4d7420acf3f662c046bacf5941113cce15bdc50952c3a0e0f6d06dc9f047f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SPTOPATIO4K3PYHIHAXRGPTBX2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement-swapping for X-states demands threshold values","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ariana Mu\\~noz, Gesa Gr\\\"uning, Luis Roa","submitted_at":"2013-11-26T19:35:27Z","abstract_excerpt":"The basic entanglement-swapping scheme can be seen as a process which allows to redistribute the Bell states' properties between different pairs of a four qubits system. Achieving the task requires performing a von Neumann measurement, which projects a pair of factorized qubits randomly onto one of the four Bell states. In this work we propose a similar scheme, by performing the same Bell-von Neumann measurement over two local qubits, each one initially being correlated through an X-state with a spatially distant qubit. This process swaps the X-feature without conditions, whereas the input ent"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6784","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":"2026-05-18T03:06:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3k4QgEEt3Qb3dPTo7YLvAAUYhQW55MjDGB/Jj1/PzKf2PWux/HpuYpjrBVsPbDknKD1eOkqLi4h+wl7EJBbtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T18:16:16.749848Z"},"content_sha256":"7923dbfd88ab7b393e16bd5af4f59793d4f9418346866c456fe9e0644067e5b2","schema_version":"1.0","event_id":"sha256:7923dbfd88ab7b393e16bd5af4f59793d4f9418346866c456fe9e0644067e5b2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/bundle.json","state_url":"https://pith.science/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/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":"2026-06-26T18:16:16Z","links":{"resolver":"https://pith.science/pith/SPTOPATIO4K3PYHIHAXRGPTBX2","bundle":"https://pith.science/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/bundle.json","state":"https://pith.science/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SPTOPATIO4K3PYHIHAXRGPTBX2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SPTOPATIO4K3PYHIHAXRGPTBX2","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":"abea3296e127d99d888dc1fe8d7cad83f00472ada246150bd5c67937707c75dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-11-26T19:35:27Z","title_canon_sha256":"77eb005ad5744ce3f35bc644af84a880ef042847aac5606708b36ba179db4494"},"schema_version":"1.0","source":{"id":"1311.6784","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6784","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6784v1","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6784","created_at":"2026-05-18T03:06:05Z"},{"alias_kind":"pith_short_12","alias_value":"SPTOPATIO4K3","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SPTOPATIO4K3PYHI","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SPTOPATI","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:7923dbfd88ab7b393e16bd5af4f59793d4f9418346866c456fe9e0644067e5b2","target":"graph","created_at":"2026-05-18T03:06:05Z","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":"The basic entanglement-swapping scheme can be seen as a process which allows to redistribute the Bell states' properties between different pairs of a four qubits system. Achieving the task requires performing a von Neumann measurement, which projects a pair of factorized qubits randomly onto one of the four Bell states. In this work we propose a similar scheme, by performing the same Bell-von Neumann measurement over two local qubits, each one initially being correlated through an X-state with a spatially distant qubit. This process swaps the X-feature without conditions, whereas the input ent","authors_text":"Ariana Mu\\~noz, Gesa Gr\\\"uning, Luis Roa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-11-26T19:35:27Z","title":"Entanglement-swapping for X-states demands threshold values"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6784","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":"sha256:9ea4d7420acf3f662c046bacf5941113cce15bdc50952c3a0e0f6d06dc9f047f","target":"record","created_at":"2026-05-18T03:06:05Z","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":"abea3296e127d99d888dc1fe8d7cad83f00472ada246150bd5c67937707c75dd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-11-26T19:35:27Z","title_canon_sha256":"77eb005ad5744ce3f35bc644af84a880ef042847aac5606708b36ba179db4494"},"schema_version":"1.0","source":{"id":"1311.6784","kind":"arxiv","version":1}},"canonical_sha256":"93e6e782687715b7e0e8382f133e61bea7a7459c3e2fd81e309798c7d9279f8b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"93e6e782687715b7e0e8382f133e61bea7a7459c3e2fd81e309798c7d9279f8b","first_computed_at":"2026-05-18T03:06:05.827836Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:06:05.827836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H+l5Y3HOmZ8t2OWQOiUwSyastkfznTCBfQ4RrQ5jRIaDsHYoQQpGC/8VQSyquA/3af2wkuzXmtZjO+Fhb9mlCA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:06:05.828365Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.6784","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ea4d7420acf3f662c046bacf5941113cce15bdc50952c3a0e0f6d06dc9f047f","sha256:7923dbfd88ab7b393e16bd5af4f59793d4f9418346866c456fe9e0644067e5b2"],"state_sha256":"c2a3858ae72bf90fb50b5fb905b5f8c7325b1374b2d2d4f6f84f3b21deb7bf4a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qxK4NI3Yq7njxJF3vqAoEVhY8a3qrcbX1BTHtS/SBH2HlejW6JnZ/ww/enF7PnTVMqW+aX6DU8qvnNoz+LSpCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T18:16:16.751892Z","bundle_sha256":"c225086a8ff29783a703f8784e18b6aad973436eb9a7f4a5bbf177c220661b39"}}