{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OOLVUCIGF737XWRA5TX4TIWVF3","short_pith_number":"pith:OOLVUCIG","canonical_record":{"source":{"id":"1908.11291","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DM","submitted_at":"2019-08-29T15:26:48Z","cross_cats_sorted":["cs.ET","quant-ph"],"title_canon_sha256":"924b52b297b6ef616e99a3861478ecfb0a52452a4e16a4307cfb13b9ad80340b","abstract_canon_sha256":"a360fdef79dd85361df47be64f09b14fcf85489cee055dc8a8aead27930d226e"},"schema_version":"1.0"},"canonical_sha256":"73975a09062ff7fbda20ecefc9a2d52effe0460dd62c17eb4b0380337f437bbd","source":{"kind":"arxiv","id":"1908.11291","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11291","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11291v1","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11291","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_12","alias_value":"OOLVUCIGF737","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_16","alias_value":"OOLVUCIGF737XWRA","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_8","alias_value":"OOLVUCIG","created_at":"2026-07-05T02:47:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OOLVUCIGF737XWRA5TX4TIWVF3","target":"record","payload":{"canonical_record":{"source":{"id":"1908.11291","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DM","submitted_at":"2019-08-29T15:26:48Z","cross_cats_sorted":["cs.ET","quant-ph"],"title_canon_sha256":"924b52b297b6ef616e99a3861478ecfb0a52452a4e16a4307cfb13b9ad80340b","abstract_canon_sha256":"a360fdef79dd85361df47be64f09b14fcf85489cee055dc8a8aead27930d226e"},"schema_version":"1.0"},"canonical_sha256":"73975a09062ff7fbda20ecefc9a2d52effe0460dd62c17eb4b0380337f437bbd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:47:37.978623Z","signature_b64":"v3DkHt03y+j0tG6/fBKOczdv3d4+zqRsmkSDYNqqFCJLP/VBhzzW2bspSh2XdFY2VX/8CkWqnEUdTMN9yBNYDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73975a09062ff7fbda20ecefc9a2d52effe0460dd62c17eb4b0380337f437bbd","last_reissued_at":"2026-07-05T02:47:37.978159Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:47:37.978159Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.11291","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":"2026-07-05T02:47:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Usurh0+I2yueOhX4PhprqoK1VAr65AsyX3B54xYS62G/EsuJIpaShkgCWwHLVWNI9PwhRcucJAT8wa4DKQwcBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T03:29:21.675386Z"},"content_sha256":"5c2acbbf6077c756afd99b17d497dfc3201eb6e6ea35b6acde9d86a7c549aff5","schema_version":"1.0","event_id":"sha256:5c2acbbf6077c756afd99b17d497dfc3201eb6e6ea35b6acde9d86a7c549aff5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OOLVUCIGF737XWRA5TX4TIWVF3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Practical implementation of a quantum backtracking algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.ET","quant-ph"],"primary_cat":"cs.DM","authors_text":"Maxime Remaud, Simon Martiel","submitted_at":"2019-08-29T15:26:48Z","abstract_excerpt":"In previous work, Montanaro presented a method to obtain quantum speedups for backtracking algorithms, a general meta-algorithm to solve constraint satisfaction problems (CSPs). In this work, we derive a space efficient implementation of this method. Assume that we want to solve a CSP with $m$ constraints on $n$ variables and that the union of the domains in which these variables take their value is of cardinality $d$. Then, we show that the implementation of Montanaro's backtracking algorithm can be done by using $O(n \\log d)$ data qubits. We detail an implementation of the predicate associat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11291","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/1908.11291/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":"2026-07-05T02:47:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yHVSBTod6TVdVq9Vd8gTOzHu6k8an9Z6AIVdFbiiJCDU1rc3GbzTxFk7p4XivbI8rqrci0mJ+JyutDpUwybOAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T03:29:21.675893Z"},"content_sha256":"9327af217c055939bdb11de663de65de0b86002f022075f91059ca2551967866","schema_version":"1.0","event_id":"sha256:9327af217c055939bdb11de663de65de0b86002f022075f91059ca2551967866"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OOLVUCIGF737XWRA5TX4TIWVF3/bundle.json","state_url":"https://pith.science/pith/OOLVUCIGF737XWRA5TX4TIWVF3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OOLVUCIGF737XWRA5TX4TIWVF3/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":"2026-08-21T03:29:21Z","links":{"resolver":"https://pith.science/pith/OOLVUCIGF737XWRA5TX4TIWVF3","bundle":"https://pith.science/pith/OOLVUCIGF737XWRA5TX4TIWVF3/bundle.json","state":"https://pith.science/pith/OOLVUCIGF737XWRA5TX4TIWVF3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OOLVUCIGF737XWRA5TX4TIWVF3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OOLVUCIGF737XWRA5TX4TIWVF3","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":"a360fdef79dd85361df47be64f09b14fcf85489cee055dc8a8aead27930d226e","cross_cats_sorted":["cs.ET","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DM","submitted_at":"2019-08-29T15:26:48Z","title_canon_sha256":"924b52b297b6ef616e99a3861478ecfb0a52452a4e16a4307cfb13b9ad80340b"},"schema_version":"1.0","source":{"id":"1908.11291","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11291","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11291v1","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11291","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_12","alias_value":"OOLVUCIGF737","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_16","alias_value":"OOLVUCIGF737XWRA","created_at":"2026-07-05T02:47:37Z"},{"alias_kind":"pith_short_8","alias_value":"OOLVUCIG","created_at":"2026-07-05T02:47:37Z"}],"graph_snapshots":[{"event_id":"sha256:9327af217c055939bdb11de663de65de0b86002f022075f91059ca2551967866","target":"graph","created_at":"2026-07-05T02:47:37Z","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/1908.11291/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In previous work, Montanaro presented a method to obtain quantum speedups for backtracking algorithms, a general meta-algorithm to solve constraint satisfaction problems (CSPs). In this work, we derive a space efficient implementation of this method. Assume that we want to solve a CSP with $m$ constraints on $n$ variables and that the union of the domains in which these variables take their value is of cardinality $d$. Then, we show that the implementation of Montanaro's backtracking algorithm can be done by using $O(n \\log d)$ data qubits. We detail an implementation of the predicate associat","authors_text":"Maxime Remaud, Simon Martiel","cross_cats":["cs.ET","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DM","submitted_at":"2019-08-29T15:26:48Z","title":"Practical implementation of a quantum backtracking algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11291","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":"sha256:5c2acbbf6077c756afd99b17d497dfc3201eb6e6ea35b6acde9d86a7c549aff5","target":"record","created_at":"2026-07-05T02:47:37Z","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":"a360fdef79dd85361df47be64f09b14fcf85489cee055dc8a8aead27930d226e","cross_cats_sorted":["cs.ET","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DM","submitted_at":"2019-08-29T15:26:48Z","title_canon_sha256":"924b52b297b6ef616e99a3861478ecfb0a52452a4e16a4307cfb13b9ad80340b"},"schema_version":"1.0","source":{"id":"1908.11291","kind":"arxiv","version":1}},"canonical_sha256":"73975a09062ff7fbda20ecefc9a2d52effe0460dd62c17eb4b0380337f437bbd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73975a09062ff7fbda20ecefc9a2d52effe0460dd62c17eb4b0380337f437bbd","first_computed_at":"2026-07-05T02:47:37.978159Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:47:37.978159Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v3DkHt03y+j0tG6/fBKOczdv3d4+zqRsmkSDYNqqFCJLP/VBhzzW2bspSh2XdFY2VX/8CkWqnEUdTMN9yBNYDw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:47:37.978623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.11291","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c2acbbf6077c756afd99b17d497dfc3201eb6e6ea35b6acde9d86a7c549aff5","sha256:9327af217c055939bdb11de663de65de0b86002f022075f91059ca2551967866"],"state_sha256":"b37810dfd186c7ae29c598da16ed347f8af2e5df45a6a19cd8d4403f1c5529b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tfOeU1CcU9UFpXY5H4KeE/fTq5FFieto1NMcOBwTA9FNt9aecaXpW/uDhFIM09THGpByDiWYFxfUooVRsxJqBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T03:29:21.681295Z","bundle_sha256":"6188c57c3abde8dcfad159373f6a4b6835244fa3c66b43ca95183ab6d24b2a31"}}