{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SJR25TOW3C44BQEUWWYD42SN2F","short_pith_number":"pith:SJR25TOW","canonical_record":{"source":{"id":"1908.11213","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T13:22:30Z","cross_cats_sorted":["cond-mat.other","cs.DS"],"title_canon_sha256":"17e76f2a17cfe5e2fa531a8f466322c58895f6105b000094b87a04f98f89f804","abstract_canon_sha256":"10991712483e67abd8cee1d95299d1b47a42e0b973018792c4f21e5c9e6be164"},"schema_version":"1.0"},"canonical_sha256":"9263aecdd6d8b9c0c094b5b03e6a4dd14d2fa3493ad29cef0a1fae032bc9b0c4","source":{"kind":"arxiv","id":"1908.11213","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11213","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11213v3","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11213","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_12","alias_value":"SJR25TOW3C44","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_16","alias_value":"SJR25TOW3C44BQEU","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_8","alias_value":"SJR25TOW","created_at":"2026-07-05T01:02:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SJR25TOW3C44BQEUWWYD42SN2F","target":"record","payload":{"canonical_record":{"source":{"id":"1908.11213","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T13:22:30Z","cross_cats_sorted":["cond-mat.other","cs.DS"],"title_canon_sha256":"17e76f2a17cfe5e2fa531a8f466322c58895f6105b000094b87a04f98f89f804","abstract_canon_sha256":"10991712483e67abd8cee1d95299d1b47a42e0b973018792c4f21e5c9e6be164"},"schema_version":"1.0"},"canonical_sha256":"9263aecdd6d8b9c0c094b5b03e6a4dd14d2fa3493ad29cef0a1fae032bc9b0c4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:02:03.876180Z","signature_b64":"cUO0zuttkNXv4VNgmP4gu3+3TuWa6zxifUgyeD0lB0jP6hfg9QMdXvZZd49u4jWy33Jlk7ZKpZ3+N4QheZiGAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9263aecdd6d8b9c0c094b5b03e6a4dd14d2fa3493ad29cef0a1fae032bc9b0c4","last_reissued_at":"2026-07-05T01:02:03.875682Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:02:03.875682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.11213","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":"2026-07-05T01:02:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Phi7iP6GwLf7lutBNJOomms/WomuTAQH8pHuB+IzGwh9xGQ7jzYlD+E3vUgl1oPzpfyxRmYjs+nkieDSimRdAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T05:58:01.648362Z"},"content_sha256":"bf43e48e29912f7f5eb212b521e70bd5fcb10c498c78d4c6ee5bdf4e0fd81ad6","schema_version":"1.0","event_id":"sha256:bf43e48e29912f7f5eb212b521e70bd5fcb10c498c78d4c6ee5bdf4e0fd81ad6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SJR25TOW3C44BQEUWWYD42SN2F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Grover search as a naturally occurring phenomenon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other","cs.DS"],"primary_cat":"quant-ph","authors_text":"Giuseppe Di Molfetta, Mathieu Roget, Pablo Arrighi, St\\'ephane Guillet","submitted_at":"2019-08-29T13:22:30Z","abstract_excerpt":"We provide first evidence that under certain conditions, 1/2-spin fermions may naturally behave like a Grover search, looking for topological defects in a material. The theoretical framework is that of discrete-time quantum walks (QW), i.e. local unitary matrices that drive the evolution of a single particle on the lattice. Some QW are well-known to recover the $(2+1)$--dimensional Dirac equation in continuum limit, i.e. the free propagation of the 1/2-spin fermion. We study two such Dirac QW, one on the square grid and the other on a triangular grid reminiscent of graphene-like materials. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11213","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/1908.11213/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":"2026-07-05T01:02:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WIo3m+Cor8A/9OAghj7EBhEngFoRHlKCIRusIQi1tv1eAbMT4b9j1/O4+id5D0frjMAEv/n7bWKLeiHiwqYaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T05:58:01.649176Z"},"content_sha256":"4f96c7d7c39ce9aba6ee75539560cff176a2930be1d726426e6bc202ed0236bc","schema_version":"1.0","event_id":"sha256:4f96c7d7c39ce9aba6ee75539560cff176a2930be1d726426e6bc202ed0236bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJR25TOW3C44BQEUWWYD42SN2F/bundle.json","state_url":"https://pith.science/pith/SJR25TOW3C44BQEUWWYD42SN2F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJR25TOW3C44BQEUWWYD42SN2F/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":"2026-08-15T05:58:01Z","links":{"resolver":"https://pith.science/pith/SJR25TOW3C44BQEUWWYD42SN2F","bundle":"https://pith.science/pith/SJR25TOW3C44BQEUWWYD42SN2F/bundle.json","state":"https://pith.science/pith/SJR25TOW3C44BQEUWWYD42SN2F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJR25TOW3C44BQEUWWYD42SN2F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SJR25TOW3C44BQEUWWYD42SN2F","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":"10991712483e67abd8cee1d95299d1b47a42e0b973018792c4f21e5c9e6be164","cross_cats_sorted":["cond-mat.other","cs.DS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T13:22:30Z","title_canon_sha256":"17e76f2a17cfe5e2fa531a8f466322c58895f6105b000094b87a04f98f89f804"},"schema_version":"1.0","source":{"id":"1908.11213","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11213","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11213v3","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11213","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_12","alias_value":"SJR25TOW3C44","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_16","alias_value":"SJR25TOW3C44BQEU","created_at":"2026-07-05T01:02:03Z"},{"alias_kind":"pith_short_8","alias_value":"SJR25TOW","created_at":"2026-07-05T01:02:03Z"}],"graph_snapshots":[{"event_id":"sha256:4f96c7d7c39ce9aba6ee75539560cff176a2930be1d726426e6bc202ed0236bc","target":"graph","created_at":"2026-07-05T01:02:03Z","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/1908.11213/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We provide first evidence that under certain conditions, 1/2-spin fermions may naturally behave like a Grover search, looking for topological defects in a material. The theoretical framework is that of discrete-time quantum walks (QW), i.e. local unitary matrices that drive the evolution of a single particle on the lattice. Some QW are well-known to recover the $(2+1)$--dimensional Dirac equation in continuum limit, i.e. the free propagation of the 1/2-spin fermion. We study two such Dirac QW, one on the square grid and the other on a triangular grid reminiscent of graphene-like materials. The","authors_text":"Giuseppe Di Molfetta, Mathieu Roget, Pablo Arrighi, St\\'ephane Guillet","cross_cats":["cond-mat.other","cs.DS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T13:22:30Z","title":"The Grover search as a naturally occurring phenomenon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11213","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:bf43e48e29912f7f5eb212b521e70bd5fcb10c498c78d4c6ee5bdf4e0fd81ad6","target":"record","created_at":"2026-07-05T01:02:03Z","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":"10991712483e67abd8cee1d95299d1b47a42e0b973018792c4f21e5c9e6be164","cross_cats_sorted":["cond-mat.other","cs.DS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-29T13:22:30Z","title_canon_sha256":"17e76f2a17cfe5e2fa531a8f466322c58895f6105b000094b87a04f98f89f804"},"schema_version":"1.0","source":{"id":"1908.11213","kind":"arxiv","version":3}},"canonical_sha256":"9263aecdd6d8b9c0c094b5b03e6a4dd14d2fa3493ad29cef0a1fae032bc9b0c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9263aecdd6d8b9c0c094b5b03e6a4dd14d2fa3493ad29cef0a1fae032bc9b0c4","first_computed_at":"2026-07-05T01:02:03.875682Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:02:03.875682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cUO0zuttkNXv4VNgmP4gu3+3TuWa6zxifUgyeD0lB0jP6hfg9QMdXvZZd49u4jWy33Jlk7ZKpZ3+N4QheZiGAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:02:03.876180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.11213","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf43e48e29912f7f5eb212b521e70bd5fcb10c498c78d4c6ee5bdf4e0fd81ad6","sha256:4f96c7d7c39ce9aba6ee75539560cff176a2930be1d726426e6bc202ed0236bc"],"state_sha256":"e9377aa428804718d702421df5c68d17bca52cff45914c6aab620b62733ab4a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W2AGTH5Sd6HoWRsnCY6edK7dVQQ+1H+qMJ9q8RL3/bJxHP924x0gjV4AQNdidpqN1ImONGmxlgxS18zeQM6JCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T05:58:01.654570Z","bundle_sha256":"61e1f3341684bfcf91b39b85f47b893af11f14d7a559ad93e7ed33c24550c374"}}