{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZWIQ625GX2NQYYEKESUF64EEX2","short_pith_number":"pith:ZWIQ625G","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"},"canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","source":{"kind":"arxiv","id":"1807.05546","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05546","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05546v3","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05546","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"ZWIQ625GX2NQ","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_16","alias_value":"ZWIQ625GX2NQYYEK","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_8","alias_value":"ZWIQ625G","created_at":"2026-07-05T00:42:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZWIQ625GX2NQYYEKESUF64EEX2","target":"record","payload":{"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"},"canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","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"},"source_kind":"arxiv","source_id":"1807.05546","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k90ftZmU6TkvNwVuwu42tZ5p3dUe5Eac4ASLr40Gv9s9VQmm4tOVm/K+onisL6GLqKrT/oc1lJ8/0yhodUbyBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:13:32.938214Z"},"content_sha256":"13b0c84194db3c4f410f95fb9f339736a11c83b99379c239f6e05ad044b1c1de","schema_version":"1.0","event_id":"sha256:13b0c84194db3c4f410f95fb9f339736a11c83b99379c239f6e05ad044b1c1de"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZWIQ625GX2NQYYEKESUF64EEX2","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XB9xaaLt1/uZBIgcLADpixUAlpTakRaJrt/3TwP/mGhsa+D/OEQSAOAbZc0s0yhPTH/nMBg+43i+UPzALBZtAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:13:32.938715Z"},"content_sha256":"fa9c4c7f019129e1cf82160075d6d320056f18e7e5378305b2d44da521c72538","schema_version":"1.0","event_id":"sha256:fa9c4c7f019129e1cf82160075d6d320056f18e7e5378305b2d44da521c72538"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/bundle.json","state_url":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZWIQ625GX2NQYYEKESUF64EEX2/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":"2026-08-04T15:13:32Z","links":{"resolver":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2","bundle":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/bundle.json","state":"https://pith.science/pith/ZWIQ625GX2NQYYEKESUF64EEX2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZWIQ625GX2NQYYEKESUF64EEX2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZWIQ625GX2NQYYEKESUF64EEX2","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":"99e5cc26a09b6241c42401f52d2633b7d0bbfa203cf023bf1b63fe2046aaa3b0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T13:28:14Z","title_canon_sha256":"89bdc42640d52211cf7db7507cb2f123faf0bf99cdb38f76ad2e54117bc607ab"},"schema_version":"1.0","source":{"id":"1807.05546","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05546","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05546v3","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05546","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"ZWIQ625GX2NQ","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_16","alias_value":"ZWIQ625GX2NQYYEK","created_at":"2026-07-05T00:42:29Z"},{"alias_kind":"pith_short_8","alias_value":"ZWIQ625G","created_at":"2026-07-05T00:42:29Z"}],"graph_snapshots":[{"event_id":"sha256:fa9c4c7f019129e1cf82160075d6d320056f18e7e5378305b2d44da521c72538","target":"graph","created_at":"2026-07-05T00:42:29Z","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/1807.05546/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"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, ","authors_text":"Marcin Markiewicz, Pawel Blasiak","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T13:28:14Z","title":"Entangling three qubits without ever touching"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05546","kind":"arxiv","version":3},"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":"sha256:13b0c84194db3c4f410f95fb9f339736a11c83b99379c239f6e05ad044b1c1de","target":"record","created_at":"2026-07-05T00:42:29Z","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":"99e5cc26a09b6241c42401f52d2633b7d0bbfa203cf023bf1b63fe2046aaa3b0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-07-15T13:28:14Z","title_canon_sha256":"89bdc42640d52211cf7db7507cb2f123faf0bf99cdb38f76ad2e54117bc607ab"},"schema_version":"1.0","source":{"id":"1807.05546","kind":"arxiv","version":3}},"canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd910f6ba6be9b0c608a24a85f7084beba1491ec22f2fbf5a0c25c0f747f3647","first_computed_at":"2026-07-05T00:42:29.586283Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:42:29.586283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vGTkw5jGvcmWmyybrq/ArWvfgXKlUdfPu/tgLvvnNYpSK2H9h4d2DnWBIeBnmhbCL3X+KEySfjQOZnh7mEjaCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:42:29.586746Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.05546","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13b0c84194db3c4f410f95fb9f339736a11c83b99379c239f6e05ad044b1c1de","sha256:fa9c4c7f019129e1cf82160075d6d320056f18e7e5378305b2d44da521c72538"],"state_sha256":"b238e88c837890976b93da479d9f361717a4f166be089e7a548486e38edc3cc5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fpBG6qE0gRS2sQ8gA7gXYORn7/V4HOTemx5BFlOU6drCmqReg+cyf1qjT15yUzNg9hsjd7uAvZzdlDyCIOnrDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T15:13:32.942455Z","bundle_sha256":"9464608a8976686a7829df31333733327c9480c66c60b64f2a053fc0975040a5"}}