{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:C2SXJMGMPTAEIJ2EOC6MW4QPJA","short_pith_number":"pith:C2SXJMGM","canonical_record":{"source":{"id":"1102.4096","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-20T19:22:32Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"2b8cc297e77a6c478fbc703e62b9ad19307e82f2587b01e1d6100ebb5b83fb1a","abstract_canon_sha256":"826a1fef4415aefb2b312157a699cae7b7e6e2b537fdda81706df40cf25cc43f"},"schema_version":"1.0"},"canonical_sha256":"16a574b0cc7cc044274470bccb720f48358ca751b3d9814f0a6b6da1c2bd6725","source":{"kind":"arxiv","id":"1102.4096","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4096","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4096v2","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4096","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"pith_short_12","alias_value":"C2SXJMGMPTAE","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"C2SXJMGMPTAEIJ2E","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"C2SXJMGM","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:C2SXJMGMPTAEIJ2EOC6MW4QPJA","target":"record","payload":{"canonical_record":{"source":{"id":"1102.4096","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-20T19:22:32Z","cross_cats_sorted":["math-ph","math.MP"],"title_canon_sha256":"2b8cc297e77a6c478fbc703e62b9ad19307e82f2587b01e1d6100ebb5b83fb1a","abstract_canon_sha256":"826a1fef4415aefb2b312157a699cae7b7e6e2b537fdda81706df40cf25cc43f"},"schema_version":"1.0"},"canonical_sha256":"16a574b0cc7cc044274470bccb720f48358ca751b3d9814f0a6b6da1c2bd6725","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:47:41.571691Z","signature_b64":"gpR7dF4/oe54OHbeMWeDa1XUWIdSQbmlZQAbbJwBPirQnTaIpwhG0SKKUCBxC3IaZLyu4z084KlIUQVBqvjqBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16a574b0cc7cc044274470bccb720f48358ca751b3d9814f0a6b6da1c2bd6725","last_reissued_at":"2026-05-18T02:47:41.570790Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:47:41.570790Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.4096","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":"2026-05-18T02:47:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aG/9o2Mtn6uMAib/jiKidyi4e7GfE9iybB3qEziWkEx8yOCfzyLv4gDeMwqIqUGBhqghNcG8ngDO/gJA/PS+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T05:26:05.958528Z"},"content_sha256":"7c6e7c24b22059b45d04e00e2faea5a98e8de576f565859085fc0636618a85c7","schema_version":"1.0","event_id":"sha256:7c6e7c24b22059b45d04e00e2faea5a98e8de576f565859085fc0636618a85c7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:C2SXJMGMPTAEIJ2EOC6MW4QPJA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Second order gradient ascent pulse engineering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math-ph","math.MP"],"primary_cat":"quant-ph","authors_text":"Ilya Kuprov, P. de Fouquieres, S.G. Schirmer, S.J. Glaser","submitted_at":"2011-02-20T19:22:32Z","abstract_excerpt":"We report some improvements to the gradient ascent pulse engineering (GRAPE) algorithm for optimal control of quantum systems. These include more accurate gradients, convergence acceleration using the BFGS quasi-Newton algorithm as well as faster control derivative calculation algorithms. In all test systems, the wall clock time and the convergence rates show a considerable improvement over the approximate gradient ascent."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4096","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":"2026-05-18T02:47:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FFCm65fYryjMV0v6EFRKJCSO0Ue1dDGzMrWZCG53Bqjviq/JuJbiD+Q/udTZ6SCwspZ+EQTofm/0qjNhIarJAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T05:26:05.959263Z"},"content_sha256":"7a2116af3e4f39a4c5eac85bf59dd913c1839831f5fd999873132e2e7037a05e","schema_version":"1.0","event_id":"sha256:7a2116af3e4f39a4c5eac85bf59dd913c1839831f5fd999873132e2e7037a05e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/bundle.json","state_url":"https://pith.science/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/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":"2026-05-31T05:26:05Z","links":{"resolver":"https://pith.science/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA","bundle":"https://pith.science/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/bundle.json","state":"https://pith.science/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C2SXJMGMPTAEIJ2EOC6MW4QPJA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:C2SXJMGMPTAEIJ2EOC6MW4QPJA","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":"826a1fef4415aefb2b312157a699cae7b7e6e2b537fdda81706df40cf25cc43f","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-20T19:22:32Z","title_canon_sha256":"2b8cc297e77a6c478fbc703e62b9ad19307e82f2587b01e1d6100ebb5b83fb1a"},"schema_version":"1.0","source":{"id":"1102.4096","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4096","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4096v2","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4096","created_at":"2026-05-18T02:47:41Z"},{"alias_kind":"pith_short_12","alias_value":"C2SXJMGMPTAE","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"C2SXJMGMPTAEIJ2E","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"C2SXJMGM","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:7a2116af3e4f39a4c5eac85bf59dd913c1839831f5fd999873132e2e7037a05e","target":"graph","created_at":"2026-05-18T02:47:41Z","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 report some improvements to the gradient ascent pulse engineering (GRAPE) algorithm for optimal control of quantum systems. These include more accurate gradients, convergence acceleration using the BFGS quasi-Newton algorithm as well as faster control derivative calculation algorithms. In all test systems, the wall clock time and the convergence rates show a considerable improvement over the approximate gradient ascent.","authors_text":"Ilya Kuprov, P. de Fouquieres, S.G. Schirmer, S.J. Glaser","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-20T19:22:32Z","title":"Second order gradient ascent pulse engineering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4096","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":"sha256:7c6e7c24b22059b45d04e00e2faea5a98e8de576f565859085fc0636618a85c7","target":"record","created_at":"2026-05-18T02:47:41Z","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":"826a1fef4415aefb2b312157a699cae7b7e6e2b537fdda81706df40cf25cc43f","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-20T19:22:32Z","title_canon_sha256":"2b8cc297e77a6c478fbc703e62b9ad19307e82f2587b01e1d6100ebb5b83fb1a"},"schema_version":"1.0","source":{"id":"1102.4096","kind":"arxiv","version":2}},"canonical_sha256":"16a574b0cc7cc044274470bccb720f48358ca751b3d9814f0a6b6da1c2bd6725","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16a574b0cc7cc044274470bccb720f48358ca751b3d9814f0a6b6da1c2bd6725","first_computed_at":"2026-05-18T02:47:41.570790Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:47:41.570790Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gpR7dF4/oe54OHbeMWeDa1XUWIdSQbmlZQAbbJwBPirQnTaIpwhG0SKKUCBxC3IaZLyu4z084KlIUQVBqvjqBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:47:41.571691Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.4096","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c6e7c24b22059b45d04e00e2faea5a98e8de576f565859085fc0636618a85c7","sha256:7a2116af3e4f39a4c5eac85bf59dd913c1839831f5fd999873132e2e7037a05e"],"state_sha256":"4ab1f4646fef9bae24ce0fa430f40e39d11c9d0d9db3756b5b3e4f9a74eee9bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FUFRfcObkAPiJzSaDMI+GIYojhpMda6ZYa6XHRjuiuXeekdN0G6CaMrsmgvBrBDp/50XK5fiQc90x4Rk3ef3Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T05:26:05.963299Z","bundle_sha256":"036b88870838d5450797a9f8598e0a54c35bb735c1f934f4936d4b4b873d5da2"}}