{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:5CBCYADI7IGPWNOE2J3YC4GDBM","short_pith_number":"pith:5CBCYADI","canonical_record":{"source":{"id":"1807.10050","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-26T10:18:45Z","cross_cats_sorted":[],"title_canon_sha256":"0d0642a15964725be61dc60d28a4ad508e921886e575fd0d0f85db0d650238ef","abstract_canon_sha256":"38b94e3e1b9b81617998ba86fb0013cea3ee783cbada369d4a8d97438a7b5b0e"},"schema_version":"1.0"},"canonical_sha256":"e8822c0068fa0cfb35c4d2778170c30b320e21780c9ac7d7f1d2b70c15fd2bd9","source":{"kind":"arxiv","id":"1807.10050","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10050","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10050v3","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10050","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"pith_short_12","alias_value":"5CBCYADI7IGP","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5CBCYADI7IGPWNOE","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5CBCYADI","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:5CBCYADI7IGPWNOE2J3YC4GDBM","target":"record","payload":{"canonical_record":{"source":{"id":"1807.10050","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-26T10:18:45Z","cross_cats_sorted":[],"title_canon_sha256":"0d0642a15964725be61dc60d28a4ad508e921886e575fd0d0f85db0d650238ef","abstract_canon_sha256":"38b94e3e1b9b81617998ba86fb0013cea3ee783cbada369d4a8d97438a7b5b0e"},"schema_version":"1.0"},"canonical_sha256":"e8822c0068fa0cfb35c4d2778170c30b320e21780c9ac7d7f1d2b70c15fd2bd9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:07.450540Z","signature_b64":"vC+QycueJYMASKn4PtMxrKwsag3QrhDO5EtdVCKRff7QYiTISt+IuAIJ3zT8mNTO+Kac9La5OceonWzAnPsuDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8822c0068fa0cfb35c4d2778170c30b320e21780c9ac7d7f1d2b70c15fd2bd9","last_reissued_at":"2026-05-17T23:57:07.449923Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:07.449923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.10050","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":"2026-05-17T23:57:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4j+HMOUEsJO6ITqpeMu+3HDUJ+VK/sYMFKRxIUY1LuwivdSK7N6hy/BK8nJMTle4vE34kVQDo04g2BeF7O7PAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:37:08.707941Z"},"content_sha256":"3aeba7b1e1565718edc90a966c7f3fee5f86beaffa181e7414cfb40ec5f59af7","schema_version":"1.0","event_id":"sha256:3aeba7b1e1565718edc90a966c7f3fee5f86beaffa181e7414cfb40ec5f59af7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:5CBCYADI7IGPWNOE2J3YC4GDBM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-cost error mitigation by symmetry verification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"M. Singh, R. Sagastizabal, T.E. O'Brien, X. Bonet-Monroig","submitted_at":"2018-07-26T10:18:45Z","abstract_excerpt":"We investigate the performance of error mitigation via measurement of conserved symmetries on near-term devices. We present two protocols to measure conserved symmetries during the bulk of an experiment, and develop a zero-cost post-processing protocol which is equivalent to a variant of the quantum subspace expansion. We develop methods for inserting global and local symetries into quantum algorithms, and for adjusting natural symmetries of the problem to boost their mitigation against different error channels. We demonstrate these techniques on two- and four-qubit simulations of the hydrogen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10050","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":"2026-05-17T23:57:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IGDF3x/9Zo3Cws1FU3Gb4EcEDPGPQoaChl0nT/CrCfnd4b1YrZIMb6TtxXkN1xouEjCX+kvao3ERopAc9jcYBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:37:08.708367Z"},"content_sha256":"c3818b488e872045d7dd6f6b851a0d0e17cd20db232e2517ed75dc3e0532adf7","schema_version":"1.0","event_id":"sha256:c3818b488e872045d7dd6f6b851a0d0e17cd20db232e2517ed75dc3e0532adf7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/bundle.json","state_url":"https://pith.science/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/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":"2026-05-30T07:37:08Z","links":{"resolver":"https://pith.science/pith/5CBCYADI7IGPWNOE2J3YC4GDBM","bundle":"https://pith.science/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/bundle.json","state":"https://pith.science/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5CBCYADI7IGPWNOE2J3YC4GDBM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5CBCYADI7IGPWNOE2J3YC4GDBM","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":"38b94e3e1b9b81617998ba86fb0013cea3ee783cbada369d4a8d97438a7b5b0e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-26T10:18:45Z","title_canon_sha256":"0d0642a15964725be61dc60d28a4ad508e921886e575fd0d0f85db0d650238ef"},"schema_version":"1.0","source":{"id":"1807.10050","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10050","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10050v3","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10050","created_at":"2026-05-17T23:57:07Z"},{"alias_kind":"pith_short_12","alias_value":"5CBCYADI7IGP","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5CBCYADI7IGPWNOE","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5CBCYADI","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:c3818b488e872045d7dd6f6b851a0d0e17cd20db232e2517ed75dc3e0532adf7","target":"graph","created_at":"2026-05-17T23:57:07Z","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 investigate the performance of error mitigation via measurement of conserved symmetries on near-term devices. We present two protocols to measure conserved symmetries during the bulk of an experiment, and develop a zero-cost post-processing protocol which is equivalent to a variant of the quantum subspace expansion. We develop methods for inserting global and local symetries into quantum algorithms, and for adjusting natural symmetries of the problem to boost their mitigation against different error channels. We demonstrate these techniques on two- and four-qubit simulations of the hydrogen","authors_text":"M. Singh, R. Sagastizabal, T.E. O'Brien, X. Bonet-Monroig","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-26T10:18:45Z","title":"Low-cost error mitigation by symmetry verification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10050","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":"sha256:3aeba7b1e1565718edc90a966c7f3fee5f86beaffa181e7414cfb40ec5f59af7","target":"record","created_at":"2026-05-17T23:57:07Z","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":"38b94e3e1b9b81617998ba86fb0013cea3ee783cbada369d4a8d97438a7b5b0e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-07-26T10:18:45Z","title_canon_sha256":"0d0642a15964725be61dc60d28a4ad508e921886e575fd0d0f85db0d650238ef"},"schema_version":"1.0","source":{"id":"1807.10050","kind":"arxiv","version":3}},"canonical_sha256":"e8822c0068fa0cfb35c4d2778170c30b320e21780c9ac7d7f1d2b70c15fd2bd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8822c0068fa0cfb35c4d2778170c30b320e21780c9ac7d7f1d2b70c15fd2bd9","first_computed_at":"2026-05-17T23:57:07.449923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:07.449923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vC+QycueJYMASKn4PtMxrKwsag3QrhDO5EtdVCKRff7QYiTISt+IuAIJ3zT8mNTO+Kac9La5OceonWzAnPsuDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:07.450540Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10050","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3aeba7b1e1565718edc90a966c7f3fee5f86beaffa181e7414cfb40ec5f59af7","sha256:c3818b488e872045d7dd6f6b851a0d0e17cd20db232e2517ed75dc3e0532adf7"],"state_sha256":"f1b8246dfcb79638be94dae8706179bfd74903642341f55c044c00dcafee1592"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jFLCaYAjOQ4PMa43TX2nNG8eL18Lh1knErc+LkIChWNm6uJtgOzT150HGo/2YO+Kbw9kkhSwewnKbrItyBpuDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:37:08.711989Z","bundle_sha256":"e4146395c9a3e72c0cff936fbc1ed0628ca90b01e56b5adf0ee5396b7abc234c"}}