{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:C42YQUJK2KKLEHXO2J4H7YPCSK","short_pith_number":"pith:C42YQUJK","canonical_record":{"source":{"id":"1709.03636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-09-12T00:56:22Z","cross_cats_sorted":["cs.MS"],"title_canon_sha256":"54127deb34d901227d1b8b44df802ad0e52a33b7b498540b101b04a719f373a9","abstract_canon_sha256":"35091f8e1066231dd53bd34c042293db7979757db07b72b23960ac4e111db223"},"schema_version":"1.0"},"canonical_sha256":"173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88","source":{"kind":"arxiv","id":"1709.03636","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.03636","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"arxiv_version","alias_value":"1709.03636v2","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.03636","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"pith_short_12","alias_value":"C42YQUJK2KKL","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"C42YQUJK2KKLEHXO","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"C42YQUJK","created_at":"2026-05-18T12:31:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:C42YQUJK2KKLEHXO2J4H7YPCSK","target":"record","payload":{"canonical_record":{"source":{"id":"1709.03636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-09-12T00:56:22Z","cross_cats_sorted":["cs.MS"],"title_canon_sha256":"54127deb34d901227d1b8b44df802ad0e52a33b7b498540b101b04a719f373a9","abstract_canon_sha256":"35091f8e1066231dd53bd34c042293db7979757db07b72b23960ac4e111db223"},"schema_version":"1.0"},"canonical_sha256":"173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:32.644912Z","signature_b64":"JpUL703HSSyLgY9hF0PzCfv4+xTuLpapiDH/yG8hwqFjB4uf1XTsPLIc3V846uUC2IZDdYT/NiUyO3VbDtyGCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88","last_reissued_at":"2026-05-17T23:57:32.644320Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:32.644320Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.03636","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:57:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J8EjPD2vadRrUsDe4T5hui98reRlK2yOxmSZwvkM+0kVNqpL8zrUVB6r37wCVJH42mZrVz43/Of9KsjIGqRyDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:48:40.740869Z"},"content_sha256":"5d414059c009450d50c725d7a42abb4b6a281535dc29f9be0f02de04dc55a1a1","schema_version":"1.0","event_id":"sha256:5d414059c009450d50c725d7a42abb4b6a281535dc29f9be0f02de04dc55a1a1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:C42YQUJK2KKLEHXO2J4H7YPCSK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"qTorch: The Quantum Tensor Contraction Handler","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MS"],"primary_cat":"quant-ph","authors_text":"Al\\'an Aspuru-Guzik, E. Schuyler Fried, Ian D. Kivlichan, Jhonathan Romero, Nicolas P. D. Sawaya, Yudong Cao","submitted_at":"2017-09-12T00:56:22Z","abstract_excerpt":"Classical simulation of quantum computation is necessary for studying the numerical behavior of quantum algorithms, as there does not yet exist a large viable quantum computer on which to perform numerical tests. Tensor network (TN) contraction is an algorithmic method that can efficiently simulate some quantum circuits, often greatly reducing the computational cost over methods that simulate the full Hilbert space. In this study we implement a tensor network contraction program for simulating quantum circuits using multi-core compute nodes. We show simulation results for the Max-Cut problem o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.03636","kind":"arxiv","version":2},"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":"2026-05-17T23:57:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+MccMGfxOg8JGqTKC7YxECulUuCMT8SvtMsV0QmkEqmuH50LlwlYxTWKj4/qK/1VaP5p6SjjDIkcvaHsqwaTCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:48:40.741544Z"},"content_sha256":"87a6dcea63382c90764f97010af728d87bc120fb7d63734f66a25946532e97c6","schema_version":"1.0","event_id":"sha256:87a6dcea63382c90764f97010af728d87bc120fb7d63734f66a25946532e97c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/bundle.json","state_url":"https://pith.science/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/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":"2026-05-25T16:48:40Z","links":{"resolver":"https://pith.science/pith/C42YQUJK2KKLEHXO2J4H7YPCSK","bundle":"https://pith.science/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/bundle.json","state":"https://pith.science/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C42YQUJK2KKLEHXO2J4H7YPCSK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:C42YQUJK2KKLEHXO2J4H7YPCSK","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":"35091f8e1066231dd53bd34c042293db7979757db07b72b23960ac4e111db223","cross_cats_sorted":["cs.MS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-09-12T00:56:22Z","title_canon_sha256":"54127deb34d901227d1b8b44df802ad0e52a33b7b498540b101b04a719f373a9"},"schema_version":"1.0","source":{"id":"1709.03636","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.03636","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"arxiv_version","alias_value":"1709.03636v2","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.03636","created_at":"2026-05-17T23:57:32Z"},{"alias_kind":"pith_short_12","alias_value":"C42YQUJK2KKL","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"C42YQUJK2KKLEHXO","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"C42YQUJK","created_at":"2026-05-18T12:31:08Z"}],"graph_snapshots":[{"event_id":"sha256:87a6dcea63382c90764f97010af728d87bc120fb7d63734f66a25946532e97c6","target":"graph","created_at":"2026-05-17T23:57:32Z","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":"Classical simulation of quantum computation is necessary for studying the numerical behavior of quantum algorithms, as there does not yet exist a large viable quantum computer on which to perform numerical tests. Tensor network (TN) contraction is an algorithmic method that can efficiently simulate some quantum circuits, often greatly reducing the computational cost over methods that simulate the full Hilbert space. In this study we implement a tensor network contraction program for simulating quantum circuits using multi-core compute nodes. We show simulation results for the Max-Cut problem o","authors_text":"Al\\'an Aspuru-Guzik, E. Schuyler Fried, Ian D. Kivlichan, Jhonathan Romero, Nicolas P. D. Sawaya, Yudong Cao","cross_cats":["cs.MS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-09-12T00:56:22Z","title":"qTorch: The Quantum Tensor Contraction Handler"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.03636","kind":"arxiv","version":2},"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":"sha256:5d414059c009450d50c725d7a42abb4b6a281535dc29f9be0f02de04dc55a1a1","target":"record","created_at":"2026-05-17T23:57:32Z","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":"35091f8e1066231dd53bd34c042293db7979757db07b72b23960ac4e111db223","cross_cats_sorted":["cs.MS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-09-12T00:56:22Z","title_canon_sha256":"54127deb34d901227d1b8b44df802ad0e52a33b7b498540b101b04a719f373a9"},"schema_version":"1.0","source":{"id":"1709.03636","kind":"arxiv","version":2}},"canonical_sha256":"173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"173588512ad294b21eeed2787fe1e292a939eb5fd9ebaa52dfa2e9f2793d5e88","first_computed_at":"2026-05-17T23:57:32.644320Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:32.644320Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JpUL703HSSyLgY9hF0PzCfv4+xTuLpapiDH/yG8hwqFjB4uf1XTsPLIc3V846uUC2IZDdYT/NiUyO3VbDtyGCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:32.644912Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.03636","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d414059c009450d50c725d7a42abb4b6a281535dc29f9be0f02de04dc55a1a1","sha256:87a6dcea63382c90764f97010af728d87bc120fb7d63734f66a25946532e97c6"],"state_sha256":"9fa892f30d45bb7bb22e9dcf861806068fe0484353c356c3e98d99bfc52bb97e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lypALOuYKg3ph5hVsL0vuS7PtRw66LqM2q0KYgcwX7Ai/owJWAd2SdKCRyGX2eEtdN4q3wrVghal/MxCnfzAAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:48:40.745394Z","bundle_sha256":"bd966733691b98e7ca181b460ece68867bbedee5a9dc1e1d72e717b92869d23e"}}