{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3KG6RDKIDZJGLS2EW6IJYIR5S7","short_pith_number":"pith:3KG6RDKI","canonical_record":{"source":{"id":"1605.02747","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-09T20:01:13Z","cross_cats_sorted":[],"title_canon_sha256":"ce3fb1a5c2710879d153d6b37a218486eb98c18b9dee484fb3a9cd6baf1b3d1d","abstract_canon_sha256":"0f0c728b1e77338a845548e4ee9f823bb8dc9ec49f2d6bdcf7549290e087335c"},"schema_version":"1.0"},"canonical_sha256":"da8de88d481e5265cb44b7909c223d97db566685f3f99a1f965443ade10863db","source":{"kind":"arxiv","id":"1605.02747","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.02747","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"arxiv_version","alias_value":"1605.02747v3","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.02747","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"pith_short_12","alias_value":"3KG6RDKIDZJG","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3KG6RDKIDZJGLS2E","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3KG6RDKI","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3KG6RDKIDZJGLS2EW6IJYIR5S7","target":"record","payload":{"canonical_record":{"source":{"id":"1605.02747","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-09T20:01:13Z","cross_cats_sorted":[],"title_canon_sha256":"ce3fb1a5c2710879d153d6b37a218486eb98c18b9dee484fb3a9cd6baf1b3d1d","abstract_canon_sha256":"0f0c728b1e77338a845548e4ee9f823bb8dc9ec49f2d6bdcf7549290e087335c"},"schema_version":"1.0"},"canonical_sha256":"da8de88d481e5265cb44b7909c223d97db566685f3f99a1f965443ade10863db","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:45:26.133119Z","signature_b64":"Rpy0aBp5b+Jcj5Hou6e+at1AYL/VYQfeBwvujIDLpWXRf/cDwOdB66WPuF5LocDoaaEzW/UoWimrgAqqWXacAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da8de88d481e5265cb44b7909c223d97db566685f3f99a1f965443ade10863db","last_reissued_at":"2026-05-18T00:45:26.132721Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:45:26.132721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.02747","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":"2026-05-18T00:45:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oKwfIucXeKyM/tDEWKIJk35a0OoAeYcEDDlpj0zgy3Ce4CsE8Zpas7X4sYNlEV8yKZ7ASYWSC0imSOdTz51GCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:25:03.236096Z"},"content_sha256":"6f93be7d2c373375026a014a7ae57e64c10a545f5c17450d2948b7a3ecb17e99","schema_version":"1.0","event_id":"sha256:6f93be7d2c373375026a014a7ae57e64c10a545f5c17450d2948b7a3ecb17e99"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3KG6RDKIDZJGLS2EW6IJYIR5S7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient state initialization by a quantum spectral filtering algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"F. Fillion-Gourdeau, R. Laflamme, S. MacLean","submitted_at":"2016-05-09T20:01:13Z","abstract_excerpt":"An algorithm that initializes a quantum register to a state with a specified energy range is given, corresponding to a quantum implementation of the celebrated Feit-Fleck method. This is performed by introducing a nondeterministic quantum implementation of a standard spectral filtering procedure combined with an apodization technique, allowing for accurate state initialization. It is shown that the implementation requires only two ancilla qubits. A lower bound for the total probability of success of this algorithm is derived, showing that this scheme can be realized using a finite, relatively "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.02747","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":""},"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":"2026-05-18T00:45:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8YlzUMzUdWMHHlhRBeoCk30xJlWNKMItC6pkzRCXeViaVR0zFg2rHoMYLaioCc1K8JeL/owWdRxqrG/OxrF4CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:25:03.236788Z"},"content_sha256":"ea10e06eb67f4ea009f5be56326ded30a0d3f9d4e3985a66fce6f7f74eb33ec5","schema_version":"1.0","event_id":"sha256:ea10e06eb67f4ea009f5be56326ded30a0d3f9d4e3985a66fce6f7f74eb33ec5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/bundle.json","state_url":"https://pith.science/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/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":"2026-05-31T17:25:03Z","links":{"resolver":"https://pith.science/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7","bundle":"https://pith.science/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/bundle.json","state":"https://pith.science/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3KG6RDKIDZJGLS2EW6IJYIR5S7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3KG6RDKIDZJGLS2EW6IJYIR5S7","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":"0f0c728b1e77338a845548e4ee9f823bb8dc9ec49f2d6bdcf7549290e087335c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-09T20:01:13Z","title_canon_sha256":"ce3fb1a5c2710879d153d6b37a218486eb98c18b9dee484fb3a9cd6baf1b3d1d"},"schema_version":"1.0","source":{"id":"1605.02747","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.02747","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"arxiv_version","alias_value":"1605.02747v3","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.02747","created_at":"2026-05-18T00:45:26Z"},{"alias_kind":"pith_short_12","alias_value":"3KG6RDKIDZJG","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3KG6RDKIDZJGLS2E","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3KG6RDKI","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:ea10e06eb67f4ea009f5be56326ded30a0d3f9d4e3985a66fce6f7f74eb33ec5","target":"graph","created_at":"2026-05-18T00:45:26Z","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":"An algorithm that initializes a quantum register to a state with a specified energy range is given, corresponding to a quantum implementation of the celebrated Feit-Fleck method. This is performed by introducing a nondeterministic quantum implementation of a standard spectral filtering procedure combined with an apodization technique, allowing for accurate state initialization. It is shown that the implementation requires only two ancilla qubits. A lower bound for the total probability of success of this algorithm is derived, showing that this scheme can be realized using a finite, relatively ","authors_text":"F. Fillion-Gourdeau, R. Laflamme, S. MacLean","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-09T20:01:13Z","title":"Efficient state initialization by a quantum spectral filtering algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.02747","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":"sha256:6f93be7d2c373375026a014a7ae57e64c10a545f5c17450d2948b7a3ecb17e99","target":"record","created_at":"2026-05-18T00:45:26Z","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":"0f0c728b1e77338a845548e4ee9f823bb8dc9ec49f2d6bdcf7549290e087335c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-05-09T20:01:13Z","title_canon_sha256":"ce3fb1a5c2710879d153d6b37a218486eb98c18b9dee484fb3a9cd6baf1b3d1d"},"schema_version":"1.0","source":{"id":"1605.02747","kind":"arxiv","version":3}},"canonical_sha256":"da8de88d481e5265cb44b7909c223d97db566685f3f99a1f965443ade10863db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"da8de88d481e5265cb44b7909c223d97db566685f3f99a1f965443ade10863db","first_computed_at":"2026-05-18T00:45:26.132721Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:26.132721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rpy0aBp5b+Jcj5Hou6e+at1AYL/VYQfeBwvujIDLpWXRf/cDwOdB66WPuF5LocDoaaEzW/UoWimrgAqqWXacAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:26.133119Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.02747","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f93be7d2c373375026a014a7ae57e64c10a545f5c17450d2948b7a3ecb17e99","sha256:ea10e06eb67f4ea009f5be56326ded30a0d3f9d4e3985a66fce6f7f74eb33ec5"],"state_sha256":"ae64998a13231a6a85ad450233fb02a99edb36d2add7822746216f5e1b1ab9be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"76cGJCNt8XML1lBWmJ4qFbVEl7gBxHRIgcySNd80lpQprDB4EN3ofEPolNncE3IgU2jlm402FrSqA6kGxsXFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T17:25:03.240250Z","bundle_sha256":"1bc1a0a16578c8dca3b2480c472480874c9c2c691da0faa161164f625efcd1f1"}}