{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:ZWIQ625GX2NQYYEKESUF64EEX2","short_pith_number":"pith:ZWIQ625G","schema_version":"1.0","canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","source":{"kind":"arxiv","id":"1807.05546","version":3},"attestation_state":"computed","paper":{"title":"Entangling three qubits without ever touching","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Marcin Markiewicz, Pawel Blasiak","submitted_at":"2018-07-15T13:28:14Z","abstract_excerpt":"All identical particles are inherently correlated from the outset, regardless of how far apart their creation took place. In this paper, this fact is used for extraction of entanglement from independent particles unaffected by any interactions. Specifically, we are concerned with operational schemes for generation of all tripartite entangled states, essentially the GHZ state and the W state, which prevent the particles from touching one another over the entire evolution. The protocols discussed in the paper require only three particles in linear optical setups with equal efficiency for boson, "},"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":"1807.05546","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T13:28:14Z","cross_cats_sorted":[],"title_canon_sha256":"89bdc42640d52211cf7db7507cb2f123faf0bf99cdb38f76ad2e54117bc607ab","abstract_canon_sha256":"99e5cc26a09b6241c42401f52d2633b7d0bbfa203cf023bf1b63fe2046aaa3b0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:42:29.586746Z","signature_b64":"vGTkw5jGvcmWmyybrq/ArWvfgXKlUdfPu/tgLvvnNYpSK2H9h4d2DnWBIeBnmhbCL3X+KEySfjQOZnh7mEjaCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","last_reissued_at":"2026-07-05T00:42:29.586283Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:42:29.586283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entangling three qubits without ever touching","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Marcin Markiewicz, Pawel Blasiak","submitted_at":"2018-07-15T13:28:14Z","abstract_excerpt":"All identical particles are inherently correlated from the outset, regardless of how far apart their creation took place. In this paper, this fact is used for extraction of entanglement from independent particles unaffected by any interactions. Specifically, we are concerned with operational schemes for generation of all tripartite entangled states, essentially the GHZ state and the W state, which prevent the particles from touching one another over the entire evolution. The protocols discussed in the paper require only three particles in linear optical setups with equal efficiency for boson, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05546","kind":"arxiv","version":3},"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/1807.05546/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":"1807.05546","created_at":"2026-07-05T00:42:29.586363+00:00"},{"alias_kind":"arxiv_version","alias_value":"1807.05546v3","created_at":"2026-07-05T00:42:29.586363+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05546","created_at":"2026-07-05T00:42:29.586363+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZWIQ625GX2NQ","created_at":"2026-07-05T00:42:29.586363+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZWIQ625GX2NQYYEK","created_at":"2026-07-05T00:42:29.586363+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZWIQ625G","created_at":"2026-07-05T00:42:29.586363+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/ZWIQ625GX2NQYYEKESUF64EEX2","json":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2.json","graph_json":"https://pith.science/api/pith-number/ZWIQ625GX2NQYYEKESUF64EEX2/graph.json","events_json":"https://pith.science/api/pith-number/ZWIQ625GX2NQYYEKESUF64EEX2/events.json","paper":"https://pith.science/paper/ZWIQ625G"},"agent_actions":{"view_html":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2","download_json":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2.json","view_paper":"https://pith.science/paper/ZWIQ625G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1807.05546&json=true","fetch_graph":"https://pith.science/api/pith-number/ZWIQ625GX2NQYYEKESUF64EEX2/graph.json","fetch_events":"https://pith.science/api/pith-number/ZWIQ625GX2NQYYEKESUF64EEX2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/action/storage_attestation","attest_author":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/action/author_attestation","sign_citation":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/action/citation_signature","submit_replication":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/action/replication_record"}},"created_at":"2026-07-05T00:42:29.586363+00:00","updated_at":"2026-07-05T00:42:29.586363+00:00"}