{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:C6PM7MIOMRJQDHDXULWGYMZCWM","short_pith_number":"pith:C6PM7MIO","canonical_record":{"source":{"id":"2607.15076","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-16T14:46:10Z","cross_cats_sorted":[],"title_canon_sha256":"59923c3128d15f91f2b1fe9e71a38ac8a0138f469fa400ab8e4ecf05c26d1374","abstract_canon_sha256":"ae44cc489c56eb9c1e806f346d30913c6ea859efbdaa0595f05daddc297e3584"},"schema_version":"1.0"},"canonical_sha256":"179ecfb10e6453019c77a2ec6c3322b30a4221bced222f7cf3a488477bb04072","source":{"kind":"arxiv","id":"2607.15076","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15076","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15076v1","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15076","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_12","alias_value":"C6PM7MIOMRJQ","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_16","alias_value":"C6PM7MIOMRJQDHDX","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_8","alias_value":"C6PM7MIO","created_at":"2026-07-17T01:22:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:C6PM7MIOMRJQDHDXULWGYMZCWM","target":"record","payload":{"canonical_record":{"source":{"id":"2607.15076","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-16T14:46:10Z","cross_cats_sorted":[],"title_canon_sha256":"59923c3128d15f91f2b1fe9e71a38ac8a0138f469fa400ab8e4ecf05c26d1374","abstract_canon_sha256":"ae44cc489c56eb9c1e806f346d30913c6ea859efbdaa0595f05daddc297e3584"},"schema_version":"1.0"},"canonical_sha256":"179ecfb10e6453019c77a2ec6c3322b30a4221bced222f7cf3a488477bb04072","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-17T01:22:08.200205Z","signature_b64":"hxtWt9LVA6MzohfcMBPzZ5qiCKjS14FX6+lugj0jLp8DGSiusW1mAjSjKndnxHvnxxEPaaZJ27Xb4X2s+0KiBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"179ecfb10e6453019c77a2ec6c3322b30a4221bced222f7cf3a488477bb04072","last_reissued_at":"2026-07-17T01:22:08.199356Z","signature_status":"signed_v1","first_computed_at":"2026-07-17T01:22:08.199356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.15076","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":"2026-07-17T01:22:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1silFl7UpbIbEup18KrE7ZCX/3mdO7WmrtUWBVpJnbbTaruQqDID70oI2WX4DuP65+soHqqlWU1yvcbqI1MIAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:01:48.996547Z"},"content_sha256":"a89a213db3d0440d33250135455f5a9b9e6851381d50077b975e65d80cd15391","schema_version":"1.0","event_id":"sha256:a89a213db3d0440d33250135455f5a9b9e6851381d50077b975e65d80cd15391"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:C6PM7MIOMRJQDHDXULWGYMZCWM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SQD-Enabled Circuit Compression for Resource-Efficient Quantum Chemistry","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jinglei Cheng, Kangyu Zheng, Shaohua Li, Yidong Zhou, Zhemin Zhang, Zhiding Liang","submitted_at":"2026-07-16T14:46:10Z","abstract_excerpt":"Subspace Quantum Diagonalization (SQD) recovers ground-state energies by classically diagonalizing a Hamiltonian in the subspace spanned by quantum samples, requiring only bitstrings with sufficient ground-state overlap rather than an accurate variational energy. We reveal and exploit this underexplored robustness property: how much non-Clifford and variational expressivity can be removed from the sampling circuit before SQD accuracy degrades? We answer through two complementary compression techniques: gradient-based operator pruning, which discards low-impact excitation operators, and Cliffor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15076","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/2607.15076/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":"2026-07-17T01:22:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TuADSjxXsxLxWa4205OXPVk+gNa4xRt7JXFcsYjxxteOQgaGl46vixq/TXfItRj/tAJVIi36dUpGmMu4BATbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:01:48.997534Z"},"content_sha256":"fa890eb36ff3f8d71fdb3a7cc9a35cb9e494f32bc4636a13b56b9f521710baf8","schema_version":"1.0","event_id":"sha256:fa890eb36ff3f8d71fdb3a7cc9a35cb9e494f32bc4636a13b56b9f521710baf8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/bundle.json","state_url":"https://pith.science/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/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":"2026-08-04T06:01:49Z","links":{"resolver":"https://pith.science/pith/C6PM7MIOMRJQDHDXULWGYMZCWM","bundle":"https://pith.science/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/bundle.json","state":"https://pith.science/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C6PM7MIOMRJQDHDXULWGYMZCWM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:C6PM7MIOMRJQDHDXULWGYMZCWM","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":"ae44cc489c56eb9c1e806f346d30913c6ea859efbdaa0595f05daddc297e3584","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-16T14:46:10Z","title_canon_sha256":"59923c3128d15f91f2b1fe9e71a38ac8a0138f469fa400ab8e4ecf05c26d1374"},"schema_version":"1.0","source":{"id":"2607.15076","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15076","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15076v1","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15076","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_12","alias_value":"C6PM7MIOMRJQ","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_16","alias_value":"C6PM7MIOMRJQDHDX","created_at":"2026-07-17T01:22:08Z"},{"alias_kind":"pith_short_8","alias_value":"C6PM7MIO","created_at":"2026-07-17T01:22:08Z"}],"graph_snapshots":[{"event_id":"sha256:fa890eb36ff3f8d71fdb3a7cc9a35cb9e494f32bc4636a13b56b9f521710baf8","target":"graph","created_at":"2026-07-17T01:22:08Z","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/2607.15076/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Subspace Quantum Diagonalization (SQD) recovers ground-state energies by classically diagonalizing a Hamiltonian in the subspace spanned by quantum samples, requiring only bitstrings with sufficient ground-state overlap rather than an accurate variational energy. We reveal and exploit this underexplored robustness property: how much non-Clifford and variational expressivity can be removed from the sampling circuit before SQD accuracy degrades? We answer through two complementary compression techniques: gradient-based operator pruning, which discards low-impact excitation operators, and Cliffor","authors_text":"Jinglei Cheng, Kangyu Zheng, Shaohua Li, Yidong Zhou, Zhemin Zhang, Zhiding Liang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-16T14:46:10Z","title":"SQD-Enabled Circuit Compression for Resource-Efficient Quantum Chemistry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15076","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:a89a213db3d0440d33250135455f5a9b9e6851381d50077b975e65d80cd15391","target":"record","created_at":"2026-07-17T01:22:08Z","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":"ae44cc489c56eb9c1e806f346d30913c6ea859efbdaa0595f05daddc297e3584","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-16T14:46:10Z","title_canon_sha256":"59923c3128d15f91f2b1fe9e71a38ac8a0138f469fa400ab8e4ecf05c26d1374"},"schema_version":"1.0","source":{"id":"2607.15076","kind":"arxiv","version":1}},"canonical_sha256":"179ecfb10e6453019c77a2ec6c3322b30a4221bced222f7cf3a488477bb04072","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"179ecfb10e6453019c77a2ec6c3322b30a4221bced222f7cf3a488477bb04072","first_computed_at":"2026-07-17T01:22:08.199356Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-17T01:22:08.199356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hxtWt9LVA6MzohfcMBPzZ5qiCKjS14FX6+lugj0jLp8DGSiusW1mAjSjKndnxHvnxxEPaaZJ27Xb4X2s+0KiBw==","signature_status":"signed_v1","signed_at":"2026-07-17T01:22:08.200205Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.15076","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a89a213db3d0440d33250135455f5a9b9e6851381d50077b975e65d80cd15391","sha256:fa890eb36ff3f8d71fdb3a7cc9a35cb9e494f32bc4636a13b56b9f521710baf8"],"state_sha256":"3cd950270e768f70fad224a2fa8b506a31a307bf42d6affea9af07eb9118e43a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p01d/ECoJDeCqFlo84jdJlO05tjJtI6OglqV8XA0a12tS1R0yanhxEh1Nest+aYrMSuqZ3N83E6G0+ekLRF0DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T06:01:49.006358Z","bundle_sha256":"7ec22ca430cd9f06081dee56ba798bc34d41fd5d4cff17c5ee635547325c75b0"}}