{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:F7A23N45TSQGISKYFHAALDFTHJ","short_pith_number":"pith:F7A23N45","canonical_record":{"source":{"id":"2606.04955","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T14:43:24Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"c125b4f5401a7170136806fdf50b1987909e50f1bbf80ecdb2de16e392a04a44","abstract_canon_sha256":"a9db67341a404afd72edcf99d73146c8027ec56c41e94aa30fa85def9ad2daa4"},"schema_version":"1.0"},"canonical_sha256":"2fc1adb79d9ca064495829c0058cb33a4b772a162f82d69244d640510fcf769e","source":{"kind":"arxiv","id":"2606.04955","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04955","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04955v1","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04955","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_12","alias_value":"F7A23N45TSQG","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_16","alias_value":"F7A23N45TSQGISKY","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_8","alias_value":"F7A23N45","created_at":"2026-06-04T01:09:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:F7A23N45TSQGISKYFHAALDFTHJ","target":"record","payload":{"canonical_record":{"source":{"id":"2606.04955","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T14:43:24Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"c125b4f5401a7170136806fdf50b1987909e50f1bbf80ecdb2de16e392a04a44","abstract_canon_sha256":"a9db67341a404afd72edcf99d73146c8027ec56c41e94aa30fa85def9ad2daa4"},"schema_version":"1.0"},"canonical_sha256":"2fc1adb79d9ca064495829c0058cb33a4b772a162f82d69244d640510fcf769e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:09:57.889116Z","signature_b64":"9Bp3mVMPtJvHPDv/ykcQPEwWa69TU8O5JAxhKUPq1yrpdoN1aSWOO96UCn9i51iX/QjZonTdEtezh5aJGAncAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2fc1adb79d9ca064495829c0058cb33a4b772a162f82d69244d640510fcf769e","last_reissued_at":"2026-06-04T01:09:57.888258Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:09:57.888258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.04955","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":"2026-06-04T01:09:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ut8ZjHmvs/UXIYyXSLfyDN8Oqt8g9mnW0HoZJjGZuGyz2JuSBjZM4aiXLN3GcpN3k08HfU98bBODs2SFIV3rCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T10:42:52.468078Z"},"content_sha256":"807536cf69579421f99891d942db71015a3599e77d738c01740adae8b09ff25e","schema_version":"1.0","event_id":"sha256:807536cf69579421f99891d942db71015a3599e77d738c01740adae8b09ff25e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:F7A23N45TSQGISKYFHAALDFTHJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Expressibility, Noise, and Error Mitigation in VQE Ansatz Selection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.ET"],"primary_cat":"quant-ph","authors_text":"Abe Kassem, Evan Coleman, Peter Annis","submitted_at":"2026-06-03T14:43:24Z","abstract_excerpt":"The variational quantum eigensolver (VQE) is a promising algorithm for near-term quantum chemistry applications, but selecting optimal ansatz circuits remains challenging. Expressibility, a metric quantifying a circuit's ability to explore the Hilbert space, has been proposed as a guide for ansatz selection, but recent work showed it inconsistently predicts VQE performance under realistic noise for $H_2$. We extend this investigation to cover both $H_2$ and $H_3^+$ under four execution scenarios: ideal, noisy, and noisy with zero-noise extrapolation (ZNE) or probabilistic error cancellation (P"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04955","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/2606.04955/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":"2026-06-04T01:09:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ncUwS8zQAjEyPdd3fyDROH+qLvvO/mbGeDCYHmm44YYklXIdotX8MsvIUYxyAyTruy5mo/3KZplcE3WIbXS1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T10:42:52.468474Z"},"content_sha256":"82766aab232c42bb4bedf3328eda281f15f506760a6abf9621a2d8e165543cbd","schema_version":"1.0","event_id":"sha256:82766aab232c42bb4bedf3328eda281f15f506760a6abf9621a2d8e165543cbd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F7A23N45TSQGISKYFHAALDFTHJ/bundle.json","state_url":"https://pith.science/pith/F7A23N45TSQGISKYFHAALDFTHJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F7A23N45TSQGISKYFHAALDFTHJ/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":"2026-06-29T10:42:52Z","links":{"resolver":"https://pith.science/pith/F7A23N45TSQGISKYFHAALDFTHJ","bundle":"https://pith.science/pith/F7A23N45TSQGISKYFHAALDFTHJ/bundle.json","state":"https://pith.science/pith/F7A23N45TSQGISKYFHAALDFTHJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F7A23N45TSQGISKYFHAALDFTHJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:F7A23N45TSQGISKYFHAALDFTHJ","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":"a9db67341a404afd72edcf99d73146c8027ec56c41e94aa30fa85def9ad2daa4","cross_cats_sorted":["cs.ET"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T14:43:24Z","title_canon_sha256":"c125b4f5401a7170136806fdf50b1987909e50f1bbf80ecdb2de16e392a04a44"},"schema_version":"1.0","source":{"id":"2606.04955","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04955","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04955v1","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04955","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_12","alias_value":"F7A23N45TSQG","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_16","alias_value":"F7A23N45TSQGISKY","created_at":"2026-06-04T01:09:57Z"},{"alias_kind":"pith_short_8","alias_value":"F7A23N45","created_at":"2026-06-04T01:09:57Z"}],"graph_snapshots":[{"event_id":"sha256:82766aab232c42bb4bedf3328eda281f15f506760a6abf9621a2d8e165543cbd","target":"graph","created_at":"2026-06-04T01:09:57Z","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/2606.04955/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The variational quantum eigensolver (VQE) is a promising algorithm for near-term quantum chemistry applications, but selecting optimal ansatz circuits remains challenging. Expressibility, a metric quantifying a circuit's ability to explore the Hilbert space, has been proposed as a guide for ansatz selection, but recent work showed it inconsistently predicts VQE performance under realistic noise for $H_2$. We extend this investigation to cover both $H_2$ and $H_3^+$ under four execution scenarios: ideal, noisy, and noisy with zero-noise extrapolation (ZNE) or probabilistic error cancellation (P","authors_text":"Abe Kassem, Evan Coleman, Peter Annis","cross_cats":["cs.ET"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T14:43:24Z","title":"Expressibility, Noise, and Error Mitigation in VQE Ansatz Selection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04955","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":"sha256:807536cf69579421f99891d942db71015a3599e77d738c01740adae8b09ff25e","target":"record","created_at":"2026-06-04T01:09:57Z","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":"a9db67341a404afd72edcf99d73146c8027ec56c41e94aa30fa85def9ad2daa4","cross_cats_sorted":["cs.ET"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-06-03T14:43:24Z","title_canon_sha256":"c125b4f5401a7170136806fdf50b1987909e50f1bbf80ecdb2de16e392a04a44"},"schema_version":"1.0","source":{"id":"2606.04955","kind":"arxiv","version":1}},"canonical_sha256":"2fc1adb79d9ca064495829c0058cb33a4b772a162f82d69244d640510fcf769e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2fc1adb79d9ca064495829c0058cb33a4b772a162f82d69244d640510fcf769e","first_computed_at":"2026-06-04T01:09:57.888258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T01:09:57.888258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9Bp3mVMPtJvHPDv/ykcQPEwWa69TU8O5JAxhKUPq1yrpdoN1aSWOO96UCn9i51iX/QjZonTdEtezh5aJGAncAw==","signature_status":"signed_v1","signed_at":"2026-06-04T01:09:57.889116Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.04955","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:807536cf69579421f99891d942db71015a3599e77d738c01740adae8b09ff25e","sha256:82766aab232c42bb4bedf3328eda281f15f506760a6abf9621a2d8e165543cbd"],"state_sha256":"3c7b636569c92307e8136f07ed69cb5e892e539e8e1cf3d1af9e5e4c34a49815"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RnmOiRfh/1tFs3kaV18oU0UsUx76bBwNPLbgZBSohEMHIv10Pb6WfcmEcIZ1DdN/72c954J7yc4ir1Hfn5yNBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T10:42:52.470386Z","bundle_sha256":"e4b71879845bc99483094ffe3fb9bdda7e8da0cd9b355ecf1bb73acb20f6c7c8"}}