{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:W4STAXVCSUFZ2JNKLQ3SS5AVWN","short_pith_number":"pith:W4STAXVC","canonical_record":{"source":{"id":"1105.4032","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-05-20T08:40:51Z","cross_cats_sorted":[],"title_canon_sha256":"0e159db4422378ef19bb20804046e68ce18c4b19c46620fcaa8d910d19bbf7f4","abstract_canon_sha256":"80dfa32a47c48a5787dcd7a34807406128a29fc2e84b97229592da4a47c26a8f"},"schema_version":"1.0"},"canonical_sha256":"b725305ea2950b9d25aa5c37297415b35c2de0617fcb3cdc0d5043b715eb9579","source":{"kind":"arxiv","id":"1105.4032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.4032","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1105.4032v1","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.4032","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"W4STAXVCSUFZ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"W4STAXVCSUFZ2JNK","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"W4STAXVC","created_at":"2026-05-18T12:26:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:W4STAXVCSUFZ2JNKLQ3SS5AVWN","target":"record","payload":{"canonical_record":{"source":{"id":"1105.4032","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-05-20T08:40:51Z","cross_cats_sorted":[],"title_canon_sha256":"0e159db4422378ef19bb20804046e68ce18c4b19c46620fcaa8d910d19bbf7f4","abstract_canon_sha256":"80dfa32a47c48a5787dcd7a34807406128a29fc2e84b97229592da4a47c26a8f"},"schema_version":"1.0"},"canonical_sha256":"b725305ea2950b9d25aa5c37297415b35c2de0617fcb3cdc0d5043b715eb9579","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:50.133897Z","signature_b64":"CfebAPkiYc6pfs+EngThvKNtHd0N9FE4/bzH/S1Wjzjk7XyFjwo684NcYG9yuC1DiD5Qdoat4ww1z71ygxvKCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b725305ea2950b9d25aa5c37297415b35c2de0617fcb3cdc0d5043b715eb9579","last_reissued_at":"2026-05-18T04:21:50.133272Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:50.133272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.4032","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":"2026-05-18T04:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C5kj6q4vaF4Ab7xlG1T3jrYtrP+oVOcym3kNUrrkYE14L4C4WHlMlIf5nB8su/3AXNaplJ+23EPaZr0Zg1XCDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:59:22.539933Z"},"content_sha256":"209322744b175ccb8a8289c5126cf51bf3d647e1ff76b140f2a430caf9340ec4","schema_version":"1.0","event_id":"sha256:209322744b175ccb8a8289c5126cf51bf3d647e1ff76b140f2a430caf9340ec4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:W4STAXVCSUFZ2JNKLQ3SS5AVWN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A quantum no-reflection theorem and the speeding up of Grover's search algorithm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. S. Paraoanu, Karthikeyan S. Kumar","submitted_at":"2011-05-20T08:40:51Z","abstract_excerpt":"We prove that it is impossible to built a universal quantum machine that produces reflections about an unknown state. We then point out a connection between this result and the optimality of Grover's search algorithm: if such reflection machines were available, it would be possible to accelerate Grover's search algorithm to exponential speedups."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.4032","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":""},"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":"2026-05-18T04:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S0344ItYW9j8prjNZ0iziWoeGHSNi9aismAgoJ59EAyK2Af7u7sedmuPshyiYiP0Qf7u4Swrc4k2wlYpdEinAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:59:22.540621Z"},"content_sha256":"a866ef8136e843e7059a9a69fffcdf803e48e239379d0ff5c7dd7cd74d5ddf3b","schema_version":"1.0","event_id":"sha256:a866ef8136e843e7059a9a69fffcdf803e48e239379d0ff5c7dd7cd74d5ddf3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/bundle.json","state_url":"https://pith.science/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/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":"2026-05-25T09:59:22Z","links":{"resolver":"https://pith.science/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN","bundle":"https://pith.science/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/bundle.json","state":"https://pith.science/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W4STAXVCSUFZ2JNKLQ3SS5AVWN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:W4STAXVCSUFZ2JNKLQ3SS5AVWN","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":"80dfa32a47c48a5787dcd7a34807406128a29fc2e84b97229592da4a47c26a8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-05-20T08:40:51Z","title_canon_sha256":"0e159db4422378ef19bb20804046e68ce18c4b19c46620fcaa8d910d19bbf7f4"},"schema_version":"1.0","source":{"id":"1105.4032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.4032","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"1105.4032v1","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.4032","created_at":"2026-05-18T04:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"W4STAXVCSUFZ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"W4STAXVCSUFZ2JNK","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"W4STAXVC","created_at":"2026-05-18T12:26:44Z"}],"graph_snapshots":[{"event_id":"sha256:a866ef8136e843e7059a9a69fffcdf803e48e239379d0ff5c7dd7cd74d5ddf3b","target":"graph","created_at":"2026-05-18T04:21:50Z","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":"We prove that it is impossible to built a universal quantum machine that produces reflections about an unknown state. We then point out a connection between this result and the optimality of Grover's search algorithm: if such reflection machines were available, it would be possible to accelerate Grover's search algorithm to exponential speedups.","authors_text":"G. S. Paraoanu, Karthikeyan S. Kumar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-05-20T08:40:51Z","title":"A quantum no-reflection theorem and the speeding up of Grover's search algorithm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.4032","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":"sha256:209322744b175ccb8a8289c5126cf51bf3d647e1ff76b140f2a430caf9340ec4","target":"record","created_at":"2026-05-18T04:21:50Z","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":"80dfa32a47c48a5787dcd7a34807406128a29fc2e84b97229592da4a47c26a8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-05-20T08:40:51Z","title_canon_sha256":"0e159db4422378ef19bb20804046e68ce18c4b19c46620fcaa8d910d19bbf7f4"},"schema_version":"1.0","source":{"id":"1105.4032","kind":"arxiv","version":1}},"canonical_sha256":"b725305ea2950b9d25aa5c37297415b35c2de0617fcb3cdc0d5043b715eb9579","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b725305ea2950b9d25aa5c37297415b35c2de0617fcb3cdc0d5043b715eb9579","first_computed_at":"2026-05-18T04:21:50.133272Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:50.133272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CfebAPkiYc6pfs+EngThvKNtHd0N9FE4/bzH/S1Wjzjk7XyFjwo684NcYG9yuC1DiD5Qdoat4ww1z71ygxvKCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:50.133897Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.4032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:209322744b175ccb8a8289c5126cf51bf3d647e1ff76b140f2a430caf9340ec4","sha256:a866ef8136e843e7059a9a69fffcdf803e48e239379d0ff5c7dd7cd74d5ddf3b"],"state_sha256":"32f9480e7fc282ac1a8127f4b449e52cc2339c5aa60151594a6eb111d487618e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3tZ8POf94KvVhdtK/rc/ibaEhBunukvGYemYmaqjgIRnjUNe9VwLmQk4BQv/Tmc4kPrIQ65rygWP7SjrOqmFAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T09:59:22.544887Z","bundle_sha256":"5599a590c0a6290ee061340347528a8374e70d1d94398894b2fb89f9cad51b99"}}