{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OFNCCQIQOJ7MBZF3NPFALYJHE3","short_pith_number":"pith:OFNCCQIQ","canonical_record":{"source":{"id":"1907.02540","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-04T18:00:04Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"1a6f5737260f92f10a19af66e611348c5f5adc861dbc7613bb22dd6792af389f","abstract_canon_sha256":"a2ac9d8828ef77b96535a2cc1e3bf38272fe553603a3993dddc2fb847ba03924"},"schema_version":"1.0"},"canonical_sha256":"715a214110727ec0e4bb6bca05e12726ef151118f3e718c6e8bb1224942f79b2","source":{"kind":"arxiv","id":"1907.02540","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02540","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02540v1","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02540","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_12","alias_value":"OFNCCQIQOJ7M","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_16","alias_value":"OFNCCQIQOJ7MBZF3","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_8","alias_value":"OFNCCQIQ","created_at":"2026-07-05T00:20:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OFNCCQIQOJ7MBZF3NPFALYJHE3","target":"record","payload":{"canonical_record":{"source":{"id":"1907.02540","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-04T18:00:04Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"1a6f5737260f92f10a19af66e611348c5f5adc861dbc7613bb22dd6792af389f","abstract_canon_sha256":"a2ac9d8828ef77b96535a2cc1e3bf38272fe553603a3993dddc2fb847ba03924"},"schema_version":"1.0"},"canonical_sha256":"715a214110727ec0e4bb6bca05e12726ef151118f3e718c6e8bb1224942f79b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:20:16.830893Z","signature_b64":"GCvz5eWqFEZcGvRA3eZoHb313VHeGY3odLVAJu6UlMtDCCvZS+ljguJEzebq3447qNb7oQm4p/+go65Cq80iCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"715a214110727ec0e4bb6bca05e12726ef151118f3e718c6e8bb1224942f79b2","last_reissued_at":"2026-07-05T00:20:16.830470Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:20:16.830470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.02540","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":"2026-07-05T00:20:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V9Td3oI2cT/iTjFlsyiifmnAxgRRyXCC2FzW+owWdYjplACMjso54u2MmHg++QhHEz3k+zxEsEp9gGTOc/1xCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:16:40.316596Z"},"content_sha256":"1ac4b2ca9ad9a6249cbf851c79f9f747586ad602f729216595baa98c28dee954","schema_version":"1.0","event_id":"sha256:1ac4b2ca9ad9a6249cbf851c79f9f747586ad602f729216595baa98c28dee954"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OFNCCQIQOJ7MBZF3NPFALYJHE3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hamiltonian Learning for Quantum Error Correction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"Agnes Valenti, Eliska Greplova, Evert van Nieuwenburg, Sebastian Huber","submitted_at":"2019-07-04T18:00:04Z","abstract_excerpt":"The efficient validation of quantum devices is critical for emerging technological applications. In a wide class of use-cases the precise engineering of a Hamiltonian is required both for the implementation of gate-based quantum information processing as well as for reliable quantum memories. Inferring the experimentally realized Hamiltonian through a scalable number of measurements constitutes the challenging task of Hamiltonian learning. In particular, assessing the quality of the implementation of topological codes is essential for quantum error correction. Here, we introduce a neural net b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02540","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/1907.02540/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":"2026-07-05T00:20:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AUO1cr1zkSxWou79IXYTMNAZAnmjzjL2gpQj/aDhSQZczuGGQH7mp6g333aK/OO1qX/OqPII495EuYdpFuuvBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:16:40.317527Z"},"content_sha256":"55a22e01128493c99a4fbeb24e50fd9417b9ca1504646ce86ceb891009f1f19d","schema_version":"1.0","event_id":"sha256:55a22e01128493c99a4fbeb24e50fd9417b9ca1504646ce86ceb891009f1f19d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/bundle.json","state_url":"https://pith.science/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/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":"2026-08-16T17:16:40Z","links":{"resolver":"https://pith.science/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3","bundle":"https://pith.science/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/bundle.json","state":"https://pith.science/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OFNCCQIQOJ7MBZF3NPFALYJHE3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OFNCCQIQOJ7MBZF3NPFALYJHE3","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":"a2ac9d8828ef77b96535a2cc1e3bf38272fe553603a3993dddc2fb847ba03924","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-04T18:00:04Z","title_canon_sha256":"1a6f5737260f92f10a19af66e611348c5f5adc861dbc7613bb22dd6792af389f"},"schema_version":"1.0","source":{"id":"1907.02540","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02540","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02540v1","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02540","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_12","alias_value":"OFNCCQIQOJ7M","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_16","alias_value":"OFNCCQIQOJ7MBZF3","created_at":"2026-07-05T00:20:16Z"},{"alias_kind":"pith_short_8","alias_value":"OFNCCQIQ","created_at":"2026-07-05T00:20:16Z"}],"graph_snapshots":[{"event_id":"sha256:55a22e01128493c99a4fbeb24e50fd9417b9ca1504646ce86ceb891009f1f19d","target":"graph","created_at":"2026-07-05T00:20:16Z","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/1907.02540/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The efficient validation of quantum devices is critical for emerging technological applications. In a wide class of use-cases the precise engineering of a Hamiltonian is required both for the implementation of gate-based quantum information processing as well as for reliable quantum memories. Inferring the experimentally realized Hamiltonian through a scalable number of measurements constitutes the challenging task of Hamiltonian learning. In particular, assessing the quality of the implementation of topological codes is essential for quantum error correction. Here, we introduce a neural net b","authors_text":"Agnes Valenti, Eliska Greplova, Evert van Nieuwenburg, Sebastian Huber","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-04T18:00:04Z","title":"Hamiltonian Learning for Quantum Error Correction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02540","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":"sha256:1ac4b2ca9ad9a6249cbf851c79f9f747586ad602f729216595baa98c28dee954","target":"record","created_at":"2026-07-05T00:20:16Z","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":"a2ac9d8828ef77b96535a2cc1e3bf38272fe553603a3993dddc2fb847ba03924","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-07-04T18:00:04Z","title_canon_sha256":"1a6f5737260f92f10a19af66e611348c5f5adc861dbc7613bb22dd6792af389f"},"schema_version":"1.0","source":{"id":"1907.02540","kind":"arxiv","version":1}},"canonical_sha256":"715a214110727ec0e4bb6bca05e12726ef151118f3e718c6e8bb1224942f79b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"715a214110727ec0e4bb6bca05e12726ef151118f3e718c6e8bb1224942f79b2","first_computed_at":"2026-07-05T00:20:16.830470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:20:16.830470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GCvz5eWqFEZcGvRA3eZoHb313VHeGY3odLVAJu6UlMtDCCvZS+ljguJEzebq3447qNb7oQm4p/+go65Cq80iCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:20:16.830893Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.02540","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ac4b2ca9ad9a6249cbf851c79f9f747586ad602f729216595baa98c28dee954","sha256:55a22e01128493c99a4fbeb24e50fd9417b9ca1504646ce86ceb891009f1f19d"],"state_sha256":"de00d07f93edeb63acb1555ff2717215b38fe3afaeb37019a07dd2523f4ea1e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JAyC8VrtqYWdK2aUu0AR+og/EcJ1ZUPg+jTq1ugX5dG/mnlrJw/UDhwO7/7+NLLm16ULuySAsNwaDDrpeOpQCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T17:16:40.323495Z","bundle_sha256":"1f1105a4962703ab5a7eb88e8a5747f769f98bee6cbd258ffc77fef2e37fec10"}}