{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QFOB6KOFMZNYJXFBMO5PWILHOT","short_pith_number":"pith:QFOB6KOF","canonical_record":{"source":{"id":"1812.07406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-17T14:27:39Z","cross_cats_sorted":[],"title_canon_sha256":"cb877f9ad5a2df892c3058bdbabc697c44014676ac3a9da8656f56802ab5203f","abstract_canon_sha256":"785be117da43398a06745605c43553e7c44854b91c7d7de2524093a9aece5df9"},"schema_version":"1.0"},"canonical_sha256":"815c1f29c5665b84dca163bafb216774cde9a14683a45be00c52bfd263a89edc","source":{"kind":"arxiv","id":"1812.07406","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.07406","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"arxiv_version","alias_value":"1812.07406v2","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.07406","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"pith_short_12","alias_value":"QFOB6KOFMZNY","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QFOB6KOFMZNYJXFB","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QFOB6KOF","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QFOB6KOFMZNYJXFBMO5PWILHOT","target":"record","payload":{"canonical_record":{"source":{"id":"1812.07406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-17T14:27:39Z","cross_cats_sorted":[],"title_canon_sha256":"cb877f9ad5a2df892c3058bdbabc697c44014676ac3a9da8656f56802ab5203f","abstract_canon_sha256":"785be117da43398a06745605c43553e7c44854b91c7d7de2524093a9aece5df9"},"schema_version":"1.0"},"canonical_sha256":"815c1f29c5665b84dca163bafb216774cde9a14683a45be00c52bfd263a89edc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:39.992248Z","signature_b64":"UBsJ+Ba0kqlJ2BsH9DqpJ8Nkd/vKHiA8rSFKW4Jj5bY8PXllbYIGe8tMrOj36QTWySQ51c6fCxcgtcsYKm5oBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"815c1f29c5665b84dca163bafb216774cde9a14683a45be00c52bfd263a89edc","last_reissued_at":"2026-05-17T23:49:39.991656Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:39.991656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.07406","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:49:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BjH7BKGi+3IdASuNyTq7gTqUTSRDvL8YJVHMYFjs4ZjAX0vFmiCNweXe3E2qxT7Pp3sbd3+WX4qTAajm9Xt1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T01:27:28.736225Z"},"content_sha256":"01d2ca1150e367cff1c87e6fc73c42297a61ae2224ba646cfe60736d96c81d63","schema_version":"1.0","event_id":"sha256:01d2ca1150e367cff1c87e6fc73c42297a61ae2224ba646cfe60736d96c81d63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QFOB6KOFMZNYJXFBMO5PWILHOT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring distances in Hilbert space by many-particle interference","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Karel Lemr, Karol Bartkiewicz, Vojt\\v{e}ch Tr\\'avn\\'i\\v{c}ek","submitted_at":"2018-12-17T14:27:39Z","abstract_excerpt":"The measures of distances between points in a Hilbert space are one of the basic theoretical concepts used to characterize properties of a quantum system with respect to some etalon state. These are not only used in studying fidelity of signal transmission and basic quantum phenomena but also applied in measuring quantum correlations, and also in quantum machine learning. The values of quantum distance measures are very difficult to determine without completely reconstructing the state. Here we demonstrate an interferometric approach to measuring distances between quantum states that in some c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.07406","kind":"arxiv","version":2},"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":"2026-05-17T23:49:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+1p94l5J2kPHxkasIzeLA53G/5J55aw90aE1Ym8Zc7o3RYmV3PRnzNRTR8fIPHF5Xfw80ZL3WdJty5wzm4ZtBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T01:27:28.736739Z"},"content_sha256":"963150624421d0c2c92af8e435b94e47a30be14aca15af52c00e710dcb7aada9","schema_version":"1.0","event_id":"sha256:963150624421d0c2c92af8e435b94e47a30be14aca15af52c00e710dcb7aada9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/bundle.json","state_url":"https://pith.science/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/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":"2026-05-26T01:27:28Z","links":{"resolver":"https://pith.science/pith/QFOB6KOFMZNYJXFBMO5PWILHOT","bundle":"https://pith.science/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/bundle.json","state":"https://pith.science/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QFOB6KOFMZNYJXFBMO5PWILHOT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QFOB6KOFMZNYJXFBMO5PWILHOT","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":"785be117da43398a06745605c43553e7c44854b91c7d7de2524093a9aece5df9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-17T14:27:39Z","title_canon_sha256":"cb877f9ad5a2df892c3058bdbabc697c44014676ac3a9da8656f56802ab5203f"},"schema_version":"1.0","source":{"id":"1812.07406","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.07406","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"arxiv_version","alias_value":"1812.07406v2","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.07406","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"pith_short_12","alias_value":"QFOB6KOFMZNY","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QFOB6KOFMZNYJXFB","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QFOB6KOF","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:963150624421d0c2c92af8e435b94e47a30be14aca15af52c00e710dcb7aada9","target":"graph","created_at":"2026-05-17T23:49:39Z","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 measures of distances between points in a Hilbert space are one of the basic theoretical concepts used to characterize properties of a quantum system with respect to some etalon state. These are not only used in studying fidelity of signal transmission and basic quantum phenomena but also applied in measuring quantum correlations, and also in quantum machine learning. The values of quantum distance measures are very difficult to determine without completely reconstructing the state. Here we demonstrate an interferometric approach to measuring distances between quantum states that in some c","authors_text":"Karel Lemr, Karol Bartkiewicz, Vojt\\v{e}ch Tr\\'avn\\'i\\v{c}ek","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-17T14:27:39Z","title":"Measuring distances in Hilbert space by many-particle interference"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.07406","kind":"arxiv","version":2},"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":"sha256:01d2ca1150e367cff1c87e6fc73c42297a61ae2224ba646cfe60736d96c81d63","target":"record","created_at":"2026-05-17T23:49:39Z","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":"785be117da43398a06745605c43553e7c44854b91c7d7de2524093a9aece5df9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-17T14:27:39Z","title_canon_sha256":"cb877f9ad5a2df892c3058bdbabc697c44014676ac3a9da8656f56802ab5203f"},"schema_version":"1.0","source":{"id":"1812.07406","kind":"arxiv","version":2}},"canonical_sha256":"815c1f29c5665b84dca163bafb216774cde9a14683a45be00c52bfd263a89edc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"815c1f29c5665b84dca163bafb216774cde9a14683a45be00c52bfd263a89edc","first_computed_at":"2026-05-17T23:49:39.991656Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:39.991656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UBsJ+Ba0kqlJ2BsH9DqpJ8Nkd/vKHiA8rSFKW4Jj5bY8PXllbYIGe8tMrOj36QTWySQ51c6fCxcgtcsYKm5oBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:39.992248Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.07406","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01d2ca1150e367cff1c87e6fc73c42297a61ae2224ba646cfe60736d96c81d63","sha256:963150624421d0c2c92af8e435b94e47a30be14aca15af52c00e710dcb7aada9"],"state_sha256":"c0837a333bb7c2e9f17115acd708e7d562fe37740eebbd06601566f466e2acae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S7g632VJCwqBNI1lwDLEVhPbwfcL2xlM8IoC6F2/7R17dJsHoThilJB4oQxlCjevwjuUjt1caVadYwh6M1SwBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T01:27:28.739960Z","bundle_sha256":"80d07f9c9fef1f248734a5fddb6b74eca6619f3bcfa658feb64ed69b17a36c1e"}}