{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:7J73NU6WLAF2A4S4OVWLUQ4KJ6","short_pith_number":"pith:7J73NU6W","canonical_record":{"source":{"id":"2606.05056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T16:15:00Z","cross_cats_sorted":[],"title_canon_sha256":"7937f84f2f77874605fcc9acfe3655aac3cb35e7ab45eef4078f7838a67b4899","abstract_canon_sha256":"e3efb15bad45b1c06c88e23cefa17b85f428186fae5cc9b8c06242f9ef4c4004"},"schema_version":"1.0"},"canonical_sha256":"fa7fb6d3d6580ba0725c756cba438a4f9274db8b076b2c373e3684f8f4579443","source":{"kind":"arxiv","id":"2606.05056","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.05056","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"arxiv_version","alias_value":"2606.05056v1","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.05056","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_12","alias_value":"7J73NU6WLAF2","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_16","alias_value":"7J73NU6WLAF2A4S4","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_8","alias_value":"7J73NU6W","created_at":"2026-06-04T01:10:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:7J73NU6WLAF2A4S4OVWLUQ4KJ6","target":"record","payload":{"canonical_record":{"source":{"id":"2606.05056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T16:15:00Z","cross_cats_sorted":[],"title_canon_sha256":"7937f84f2f77874605fcc9acfe3655aac3cb35e7ab45eef4078f7838a67b4899","abstract_canon_sha256":"e3efb15bad45b1c06c88e23cefa17b85f428186fae5cc9b8c06242f9ef4c4004"},"schema_version":"1.0"},"canonical_sha256":"fa7fb6d3d6580ba0725c756cba438a4f9274db8b076b2c373e3684f8f4579443","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:10:04.388598Z","signature_b64":"log1Pu6MdiDw/UxXWrwJaALNAUw2cO6kX4reFRk5WOyUDC4OesH6QEEr55V5BAqe4G+tZwQmOlxrFSeZyJp5Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa7fb6d3d6580ba0725c756cba438a4f9274db8b076b2c373e3684f8f4579443","last_reissued_at":"2026-06-04T01:10:04.387823Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:10:04.387823Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.05056","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":"2026-06-04T01:10:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VlZNCdFKCDQheg/cT6WtKmpW1gw8+B9sIvHf1QpTiI/DMRUsYWjMmA/i7cA/UX7PlEGGgfwi6gCueBiznRC1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:40:23.989948Z"},"content_sha256":"ac2a18f8d7dc3578cdf0a0fa07cc2b6f933ce2162a84699146dee170a737554d","schema_version":"1.0","event_id":"sha256:ac2a18f8d7dc3578cdf0a0fa07cc2b6f933ce2162a84699146dee170a737554d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:7J73NU6WLAF2A4S4OVWLUQ4KJ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring Entanglement in Qubit System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Tabish Qureshi, Vignesh S","submitted_at":"2026-06-03T16:15:00Z","abstract_excerpt":"An operational way of measuring entanglement in a balanced two-path interferometers is presented, where path information is carried by some internal degree of freedom which, in turn, gets entangled with an ancilla system. The analysis is based on a tripartite description involving paths, an internal qubit degree of freedom, and some ancillary states entangled with the internal degree of freedom. It is then applied to two physically distinct experimental situations: a modified Stern-Gerlach interferometer with spin-1/2 particles and a Mach-Zehnder interferometer with photons carrying polarizati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.05056","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.05056/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":"2026-06-04T01:10:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6aZEchAAw03gZbGB1qwAZlS2a7RrfspIs2p9hq0GsOKK8F0onq6atH9NiB/4IWpPVdcSLWB/Ms78rvmzSaFoDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:40:23.990304Z"},"content_sha256":"281c943ede38946ab43a0eac014431cab344fe930e2963906288cedba8b24367","schema_version":"1.0","event_id":"sha256:281c943ede38946ab43a0eac014431cab344fe930e2963906288cedba8b24367"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/bundle.json","state_url":"https://pith.science/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/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":"2026-06-09T00:40:23Z","links":{"resolver":"https://pith.science/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6","bundle":"https://pith.science/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/bundle.json","state":"https://pith.science/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7J73NU6WLAF2A4S4OVWLUQ4KJ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7J73NU6WLAF2A4S4OVWLUQ4KJ6","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":"e3efb15bad45b1c06c88e23cefa17b85f428186fae5cc9b8c06242f9ef4c4004","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T16:15:00Z","title_canon_sha256":"7937f84f2f77874605fcc9acfe3655aac3cb35e7ab45eef4078f7838a67b4899"},"schema_version":"1.0","source":{"id":"2606.05056","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.05056","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"arxiv_version","alias_value":"2606.05056v1","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.05056","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_12","alias_value":"7J73NU6WLAF2","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_16","alias_value":"7J73NU6WLAF2A4S4","created_at":"2026-06-04T01:10:04Z"},{"alias_kind":"pith_short_8","alias_value":"7J73NU6W","created_at":"2026-06-04T01:10:04Z"}],"graph_snapshots":[{"event_id":"sha256:281c943ede38946ab43a0eac014431cab344fe930e2963906288cedba8b24367","target":"graph","created_at":"2026-06-04T01:10:04Z","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/2606.05056/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"An operational way of measuring entanglement in a balanced two-path interferometers is presented, where path information is carried by some internal degree of freedom which, in turn, gets entangled with an ancilla system. The analysis is based on a tripartite description involving paths, an internal qubit degree of freedom, and some ancillary states entangled with the internal degree of freedom. It is then applied to two physically distinct experimental situations: a modified Stern-Gerlach interferometer with spin-1/2 particles and a Mach-Zehnder interferometer with photons carrying polarizati","authors_text":"Tabish Qureshi, Vignesh S","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T16:15:00Z","title":"Measuring Entanglement in Qubit System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.05056","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:ac2a18f8d7dc3578cdf0a0fa07cc2b6f933ce2162a84699146dee170a737554d","target":"record","created_at":"2026-06-04T01:10:04Z","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":"e3efb15bad45b1c06c88e23cefa17b85f428186fae5cc9b8c06242f9ef4c4004","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T16:15:00Z","title_canon_sha256":"7937f84f2f77874605fcc9acfe3655aac3cb35e7ab45eef4078f7838a67b4899"},"schema_version":"1.0","source":{"id":"2606.05056","kind":"arxiv","version":1}},"canonical_sha256":"fa7fb6d3d6580ba0725c756cba438a4f9274db8b076b2c373e3684f8f4579443","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa7fb6d3d6580ba0725c756cba438a4f9274db8b076b2c373e3684f8f4579443","first_computed_at":"2026-06-04T01:10:04.387823Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T01:10:04.387823Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"log1Pu6MdiDw/UxXWrwJaALNAUw2cO6kX4reFRk5WOyUDC4OesH6QEEr55V5BAqe4G+tZwQmOlxrFSeZyJp5Dg==","signature_status":"signed_v1","signed_at":"2026-06-04T01:10:04.388598Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.05056","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ac2a18f8d7dc3578cdf0a0fa07cc2b6f933ce2162a84699146dee170a737554d","sha256:281c943ede38946ab43a0eac014431cab344fe930e2963906288cedba8b24367"],"state_sha256":"9256ca426b54160768e7f294389124a9afec6ed5f277b95c73ac62ce9dca8276"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KJTlY47+LljdUwQ6knOw4qv99NP7rRP8AF6E2ewZaNvnZU3Cou5PT56eK3RdrJWZk1O9kBueh4ZGfmBs2MlbBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T00:40:23.992127Z","bundle_sha256":"cdd43e80960bd429c0c765f8fc354affd67cf596c481558343477e11e4c1b5e6"}}