{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:BUWQWJ2T4OJPAXF4QS4F5TFN55","short_pith_number":"pith:BUWQWJ2T","canonical_record":{"source":{"id":"2107.07532","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-15T18:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"a882323c7c3332da30b46b1501c4a28a87f4bc5f9303be0840aa7ae9b55167f7","abstract_canon_sha256":"94f6e3de663e23196c4e665a23af81cf3708b1f98ea4d4d99e8331248a7ba656"},"schema_version":"1.0"},"canonical_sha256":"0d2d0b2753e392f05cbc84b85eccadef502573a67345f39e671490329416ecd4","source":{"kind":"arxiv","id":"2107.07532","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.07532","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"arxiv_version","alias_value":"2107.07532v3","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.07532","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_12","alias_value":"BUWQWJ2T4OJP","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_16","alias_value":"BUWQWJ2T4OJPAXF4","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_8","alias_value":"BUWQWJ2T","created_at":"2026-07-05T07:00:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:BUWQWJ2T4OJPAXF4QS4F5TFN55","target":"record","payload":{"canonical_record":{"source":{"id":"2107.07532","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-15T18:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"a882323c7c3332da30b46b1501c4a28a87f4bc5f9303be0840aa7ae9b55167f7","abstract_canon_sha256":"94f6e3de663e23196c4e665a23af81cf3708b1f98ea4d4d99e8331248a7ba656"},"schema_version":"1.0"},"canonical_sha256":"0d2d0b2753e392f05cbc84b85eccadef502573a67345f39e671490329416ecd4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:00:05.675546Z","signature_b64":"JEz+M87+bKx9xr7G+iyd3fTD2IfFgSXQOP4SwSxjEA1OYttQX6nG7iwAuFv9VstSP/9/hijzmhA3ocs3xvmCCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d2d0b2753e392f05cbc84b85eccadef502573a67345f39e671490329416ecd4","last_reissued_at":"2026-07-05T07:00:05.675050Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:00:05.675050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.07532","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":"2026-07-05T07:00:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZYJQtRF8o3kNXBoSOT/jXxEM0NTD7ZeQ6kk7JMxRyHZogiE376ZW2K/3kHaZR5sDM+9NldknVAqJwxoEVmAYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T04:13:26.493687Z"},"content_sha256":"d4d2e27bf1688bd3ec2647068e10caf6b461760396f9f871111225a9f9204784","schema_version":"1.0","event_id":"sha256:d4d2e27bf1688bd3ec2647068e10caf6b461760396f9f871111225a9f9204784"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:BUWQWJ2T4OJPAXF4QS4F5TFN55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Divide and Conquer for Combinatorial Optimization and Distributed Quantum Computation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Margaret Martonosi, Martin Suchara, Michael A. Perlin, Pranav Gokhale, Teague Tomesh, Zain H. Saleem","submitted_at":"2021-07-15T18:00:32Z","abstract_excerpt":"Scaling the size of monolithic quantum computer systems is a difficult task. As the number of qubits within a device increases, a number of factors contribute to decreases in yield and performance. To meet this challenge, distributed architectures composed of many networked quantum computers have been proposed as a viable path to scalability. Such systems will need algorithms and compilers that are tailored to their distributed architectures. In this work we introduce the Quantum Divide and Conquer Algorithm (QDCA), a hybrid variational approach to mapping large combinatorial optimization prob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.07532","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/2107.07532/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":"2026-07-05T07:00:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3BsziKcgd+C/g0+G1jdVXf91GBRjrs5jf7YHjark2ONP/JVDWNrWxsR2t7sGTYetPgFVJIHTi7ae/CspFFT7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T04:13:26.495076Z"},"content_sha256":"c7938918d112a6698bc26bf7e1b56749c93fe765e86d9d89c94415adcc0d4db8","schema_version":"1.0","event_id":"sha256:c7938918d112a6698bc26bf7e1b56749c93fe765e86d9d89c94415adcc0d4db8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/bundle.json","state_url":"https://pith.science/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/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":"2026-08-10T04:13:26Z","links":{"resolver":"https://pith.science/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55","bundle":"https://pith.science/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/bundle.json","state":"https://pith.science/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BUWQWJ2T4OJPAXF4QS4F5TFN55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:BUWQWJ2T4OJPAXF4QS4F5TFN55","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":"94f6e3de663e23196c4e665a23af81cf3708b1f98ea4d4d99e8331248a7ba656","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-15T18:00:32Z","title_canon_sha256":"a882323c7c3332da30b46b1501c4a28a87f4bc5f9303be0840aa7ae9b55167f7"},"schema_version":"1.0","source":{"id":"2107.07532","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.07532","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"arxiv_version","alias_value":"2107.07532v3","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.07532","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_12","alias_value":"BUWQWJ2T4OJP","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_16","alias_value":"BUWQWJ2T4OJPAXF4","created_at":"2026-07-05T07:00:05Z"},{"alias_kind":"pith_short_8","alias_value":"BUWQWJ2T","created_at":"2026-07-05T07:00:05Z"}],"graph_snapshots":[{"event_id":"sha256:c7938918d112a6698bc26bf7e1b56749c93fe765e86d9d89c94415adcc0d4db8","target":"graph","created_at":"2026-07-05T07:00:05Z","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/2107.07532/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Scaling the size of monolithic quantum computer systems is a difficult task. As the number of qubits within a device increases, a number of factors contribute to decreases in yield and performance. To meet this challenge, distributed architectures composed of many networked quantum computers have been proposed as a viable path to scalability. Such systems will need algorithms and compilers that are tailored to their distributed architectures. In this work we introduce the Quantum Divide and Conquer Algorithm (QDCA), a hybrid variational approach to mapping large combinatorial optimization prob","authors_text":"Margaret Martonosi, Martin Suchara, Michael A. Perlin, Pranav Gokhale, Teague Tomesh, Zain H. Saleem","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-15T18:00:32Z","title":"Divide and Conquer for Combinatorial Optimization and Distributed Quantum Computation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.07532","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:d4d2e27bf1688bd3ec2647068e10caf6b461760396f9f871111225a9f9204784","target":"record","created_at":"2026-07-05T07:00:05Z","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":"94f6e3de663e23196c4e665a23af81cf3708b1f98ea4d4d99e8331248a7ba656","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-15T18:00:32Z","title_canon_sha256":"a882323c7c3332da30b46b1501c4a28a87f4bc5f9303be0840aa7ae9b55167f7"},"schema_version":"1.0","source":{"id":"2107.07532","kind":"arxiv","version":3}},"canonical_sha256":"0d2d0b2753e392f05cbc84b85eccadef502573a67345f39e671490329416ecd4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d2d0b2753e392f05cbc84b85eccadef502573a67345f39e671490329416ecd4","first_computed_at":"2026-07-05T07:00:05.675050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:00:05.675050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JEz+M87+bKx9xr7G+iyd3fTD2IfFgSXQOP4SwSxjEA1OYttQX6nG7iwAuFv9VstSP/9/hijzmhA3ocs3xvmCCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:00:05.675546Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.07532","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4d2e27bf1688bd3ec2647068e10caf6b461760396f9f871111225a9f9204784","sha256:c7938918d112a6698bc26bf7e1b56749c93fe765e86d9d89c94415adcc0d4db8"],"state_sha256":"138884c71392303052fb2a3b0c0341532d5fb4ca37edff5f635630a14cb392b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZEf5+EsBsvEY409c536jg4mTOIhN3KYID4+iZgfNfeoGlIG4CRm87AGVDqkxTiOWMcawALcuYZse2Bl3Ea+KBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T04:13:26.507448Z","bundle_sha256":"3ecff87fc62dc2150f579f4e4d355ecb90fff44544b245aa228deb98dc577c2d"}}