{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:VJ2OQCDLT4TSXWBMEUHOM74IJF","short_pith_number":"pith:VJ2OQCDL","canonical_record":{"source":{"id":"2106.10055","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-18T11:07:33Z","cross_cats_sorted":[],"title_canon_sha256":"042adb272f991f60745492ee3138c6526a19737e53aaf1cbaef7e0a2b6923014","abstract_canon_sha256":"3f30f9ad4ae7767014c3fa61b795f477e0b5454fbe2e44fef5b73363b97bad5b"},"schema_version":"1.0"},"canonical_sha256":"aa74e8086b9f272bd82c250ee67f88496b8f11b216e629a7d53e34767e5faddf","source":{"kind":"arxiv","id":"2106.10055","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.10055","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"arxiv_version","alias_value":"2106.10055v3","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.10055","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_12","alias_value":"VJ2OQCDLT4TS","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_16","alias_value":"VJ2OQCDLT4TSXWBM","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_8","alias_value":"VJ2OQCDL","created_at":"2026-07-05T03:55:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:VJ2OQCDLT4TSXWBMEUHOM74IJF","target":"record","payload":{"canonical_record":{"source":{"id":"2106.10055","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-18T11:07:33Z","cross_cats_sorted":[],"title_canon_sha256":"042adb272f991f60745492ee3138c6526a19737e53aaf1cbaef7e0a2b6923014","abstract_canon_sha256":"3f30f9ad4ae7767014c3fa61b795f477e0b5454fbe2e44fef5b73363b97bad5b"},"schema_version":"1.0"},"canonical_sha256":"aa74e8086b9f272bd82c250ee67f88496b8f11b216e629a7d53e34767e5faddf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:55:48.340004Z","signature_b64":"F34bhbnWo8XP1yQI/KAssc/LO9mre4xvgs+RSGhxjH+tnpmzmADunurvTtjT4hWJAB8nAKEdJStnqA0l7gV4Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa74e8086b9f272bd82c250ee67f88496b8f11b216e629a7d53e34767e5faddf","last_reissued_at":"2026-07-05T03:55:48.339508Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:55:48.339508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.10055","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":"2026-07-05T03:55:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lDW2Ik+dERXNGCxUona6fS8GcuxSdycwg81dSvD2Fq6Ikmbltyp2FP7Bla5e1i5sh/hrkoTrZb63qC8hyiXcDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T01:23:42.940387Z"},"content_sha256":"fa4f9caa2301a046af60216a2016103c3431199b1e0bb2b325e396d3f832201a","schema_version":"1.0","event_id":"sha256:fa4f9caa2301a046af60216a2016103c3431199b1e0bb2b325e396d3f832201a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:VJ2OQCDLT4TSXWBMEUHOM74IJF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Filtering variational quantum algorithms for combinatorial optimization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlo Modica, David Amaro, Marcello Benedetti, Matthias Rosenkranz, Mattia Fiorentini, Michael Lubasch","submitted_at":"2021-06-18T11:07:33Z","abstract_excerpt":"Current gate-based quantum computers have the potential to provide a computational advantage if algorithms use quantum hardware efficiently. To make combinatorial optimization more efficient, we introduce the Filtering Variational Quantum Eigensolver (F-VQE) which utilizes filtering operators to achieve faster and more reliable convergence to the optimal solution. Additionally we explore the use of causal cones to reduce the number of qubits required on a quantum computer. Using random weighted MaxCut problems, we numerically analyze our methods and show that they perform better than the origi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.10055","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2106.10055/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":"2026-07-05T03:55:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8HhnGIYv2wx0Q0DKTkVF5Qge4YqReLTiZCco3xCQc6EDvCdZoBJBcD9RVlymUZvpJVcIcmfK6z1WuIb3ALm/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T01:23:42.940904Z"},"content_sha256":"255c95c1aa7c602d206fe6c2868ee9009a3f864096ca630323faac0133335a84","schema_version":"1.0","event_id":"sha256:255c95c1aa7c602d206fe6c2868ee9009a3f864096ca630323faac0133335a84"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/bundle.json","state_url":"https://pith.science/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/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":"2026-08-09T01:23:42Z","links":{"resolver":"https://pith.science/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF","bundle":"https://pith.science/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/bundle.json","state":"https://pith.science/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VJ2OQCDLT4TSXWBMEUHOM74IJF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VJ2OQCDLT4TSXWBMEUHOM74IJF","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":"3f30f9ad4ae7767014c3fa61b795f477e0b5454fbe2e44fef5b73363b97bad5b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-18T11:07:33Z","title_canon_sha256":"042adb272f991f60745492ee3138c6526a19737e53aaf1cbaef7e0a2b6923014"},"schema_version":"1.0","source":{"id":"2106.10055","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.10055","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"arxiv_version","alias_value":"2106.10055v3","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.10055","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_12","alias_value":"VJ2OQCDLT4TS","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_16","alias_value":"VJ2OQCDLT4TSXWBM","created_at":"2026-07-05T03:55:48Z"},{"alias_kind":"pith_short_8","alias_value":"VJ2OQCDL","created_at":"2026-07-05T03:55:48Z"}],"graph_snapshots":[{"event_id":"sha256:255c95c1aa7c602d206fe6c2868ee9009a3f864096ca630323faac0133335a84","target":"graph","created_at":"2026-07-05T03:55:48Z","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/2106.10055/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Current gate-based quantum computers have the potential to provide a computational advantage if algorithms use quantum hardware efficiently. To make combinatorial optimization more efficient, we introduce the Filtering Variational Quantum Eigensolver (F-VQE) which utilizes filtering operators to achieve faster and more reliable convergence to the optimal solution. Additionally we explore the use of causal cones to reduce the number of qubits required on a quantum computer. Using random weighted MaxCut problems, we numerically analyze our methods and show that they perform better than the origi","authors_text":"Carlo Modica, David Amaro, Marcello Benedetti, Matthias Rosenkranz, Mattia Fiorentini, Michael Lubasch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-18T11:07:33Z","title":"Filtering variational quantum algorithms for combinatorial optimization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.10055","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:fa4f9caa2301a046af60216a2016103c3431199b1e0bb2b325e396d3f832201a","target":"record","created_at":"2026-07-05T03:55:48Z","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":"3f30f9ad4ae7767014c3fa61b795f477e0b5454fbe2e44fef5b73363b97bad5b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-06-18T11:07:33Z","title_canon_sha256":"042adb272f991f60745492ee3138c6526a19737e53aaf1cbaef7e0a2b6923014"},"schema_version":"1.0","source":{"id":"2106.10055","kind":"arxiv","version":3}},"canonical_sha256":"aa74e8086b9f272bd82c250ee67f88496b8f11b216e629a7d53e34767e5faddf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa74e8086b9f272bd82c250ee67f88496b8f11b216e629a7d53e34767e5faddf","first_computed_at":"2026-07-05T03:55:48.339508Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:55:48.339508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F34bhbnWo8XP1yQI/KAssc/LO9mre4xvgs+RSGhxjH+tnpmzmADunurvTtjT4hWJAB8nAKEdJStnqA0l7gV4Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:55:48.340004Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.10055","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fa4f9caa2301a046af60216a2016103c3431199b1e0bb2b325e396d3f832201a","sha256:255c95c1aa7c602d206fe6c2868ee9009a3f864096ca630323faac0133335a84"],"state_sha256":"fb75d4b4d35a65a8222b63ba9a4e0921a2ed88f0546423d1108d2caa9be697b2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"smW2Jom0bOo7XkoqdKgW1eNMn6pG2ds6b+pWnl0hcW+cU1YzlwqljRa3J2Ax/ZClBwjQbc8ftZ0kn7PjqgdABw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T01:23:42.945275Z","bundle_sha256":"e712b8eac82943d8ebadc102e7bdd3db64e4ddbebd21eb26ad2c9bf943b55f96"}}